Precalculus Examples

$y^{2} + 31 y + x^{2} - 4 x - 32 = 0$ , $y + 31 + \frac{4 x - 32}{y} = 0$

Step 1

Use the quadratic formula to find the solutions.

$\frac{- b \pm \sqrt{b^{2} - 4 (a c)}}{2 a}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Step 2

Substitute the values $a = 1$ , $b = 31$ , and $c = x^{2} - 4 x - 32$ into the quadratic formula and solve for $y$ .

$\frac{- 31 \pm \sqrt{31^{2} - 4 \cdot (1 \cdot (x^{2} - 4 x - 32))}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Step 3

Simplify.

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Simplify the numerator.

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Raise $31$ to the power of $2$ .

$y = \frac{- 31 \pm \sqrt{961 - 4 \cdot 1 \cdot (x^{2} - 4 x - 32)}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Multiply $- 4$ by $1$ .

$y = \frac{- 31 \pm \sqrt{961 - 4 \cdot (x^{2} - 4 x - 32)}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Apply the distributive property.

$y = \frac{- 31 \pm \sqrt{961 - 4 x^{2} - 4 (- 4 x) - 4 \cdot - 32}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Simplify.

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Multiply $- 4$ by $- 4$ .

$y = \frac{- 31 \pm \sqrt{961 - 4 x^{2} + 16 x - 4 \cdot - 32}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Multiply $- 4$ by $- 32$ .

$y = \frac{- 31 \pm \sqrt{961 - 4 x^{2} + 16 x + 128}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

$y = \frac{- 31 \pm \sqrt{961 - 4 x^{2} + 16 x + 128}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Add $961$ and $128$ .

$y = \frac{- 31 \pm \sqrt{- 4 x^{2} + 16 x + 1089}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

$y = \frac{- 31 \pm \sqrt{- 4 x^{2} + 16 x + 1089}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Multiply $2$ by $1$ .

$y = \frac{- 31 \pm \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y + 31 + \frac{4 x - 32}{y} = 0$

$y = \frac{- 31 \pm \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Step 4

Simplify the expression to solve for the $+$ portion of the $\pm$ .

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Simplify the numerator.

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Raise $31$ to the power of $2$ .

$y = \frac{- 31 \pm \sqrt{961 - 4 \cdot 1 \cdot (x^{2} - 4 x - 32)}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Multiply $- 4$ by $1$ .

$y = \frac{- 31 \pm \sqrt{961 - 4 \cdot (x^{2} - 4 x - 32)}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Apply the distributive property.

$y = \frac{- 31 \pm \sqrt{961 - 4 x^{2} - 4 (- 4 x) - 4 \cdot - 32}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Simplify.

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Multiply $- 4$ by $- 4$ .

$y = \frac{- 31 \pm \sqrt{961 - 4 x^{2} + 16 x - 4 \cdot - 32}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Multiply $- 4$ by $- 32$ .

$y = \frac{- 31 \pm \sqrt{961 - 4 x^{2} + 16 x + 128}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

$y = \frac{- 31 \pm \sqrt{961 - 4 x^{2} + 16 x + 128}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Add $961$ and $128$ .

$y = \frac{- 31 \pm \sqrt{- 4 x^{2} + 16 x + 1089}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

$y = \frac{- 31 \pm \sqrt{- 4 x^{2} + 16 x + 1089}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Multiply $2$ by $1$ .

$y = \frac{- 31 \pm \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Change the $\pm$ to $+$ .

$y = \frac{- 31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Rewrite $- 31$ as $- 1 (31)$ .

$y = \frac{- 1 \cdot 31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Factor $- 1$ out of $\sqrt{- 4 x^{2} + 16 x + 1089}$ .

$y = \frac{- 1 \cdot 31 - 1 (- \sqrt{- 4 x^{2} + 16 x + 1089})}{2}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Factor $- 1$ out of $- 1 (31) - 1 (- \sqrt{- 4 x^{2} + 16 x + 1089})$ .

$y = \frac{- 1 (31 - \sqrt{- 4 x^{2} + 16 x + 1089})}{2}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Move the negative in front of the fraction.

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y + 31 + \frac{4 x - 32}{y} = 0$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Step 5

Simplify the expression to solve for the $-$ portion of the $\pm$ .

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Simplify the numerator.

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Raise $31$ to the power of $2$ .

$y = \frac{- 31 \pm \sqrt{961 - 4 \cdot 1 \cdot (x^{2} - 4 x - 32)}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Multiply $- 4$ by $1$ .

$y = \frac{- 31 \pm \sqrt{961 - 4 \cdot (x^{2} - 4 x - 32)}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Apply the distributive property.

$y = \frac{- 31 \pm \sqrt{961 - 4 x^{2} - 4 (- 4 x) - 4 \cdot - 32}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Simplify.

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Multiply $- 4$ by $- 4$ .

$y = \frac{- 31 \pm \sqrt{961 - 4 x^{2} + 16 x - 4 \cdot - 32}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Multiply $- 4$ by $- 32$ .

$y = \frac{- 31 \pm \sqrt{961 - 4 x^{2} + 16 x + 128}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

$y = \frac{- 31 \pm \sqrt{961 - 4 x^{2} + 16 x + 128}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Add $961$ and $128$ .

$y = \frac{- 31 \pm \sqrt{- 4 x^{2} + 16 x + 1089}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

$y = \frac{- 31 \pm \sqrt{- 4 x^{2} + 16 x + 1089}}{2 \cdot 1}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Multiply $2$ by $1$ .

$y = \frac{- 31 \pm \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Change the $\pm$ to $-$ .

$y = \frac{- 31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Factor $- 1$ out of $- 31 - \sqrt{- 4 x^{2} + 16 x + 1089}$ .

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Rewrite $- 31$ as $- 1 (31)$ .

$y = \frac{- 1 \cdot 31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Factor $- 1$ out of $- \sqrt{- 4 x^{2} + 16 x + 1089}$ .

$y = \frac{- 1 \cdot 31 - (\sqrt{- 4 x^{2} + 16 x + 1089})}{2}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Factor $- 1$ out of $- 1 (31) - (\sqrt{- 4 x^{2} + 16 x + 1089})$ .

$y = \frac{- 1 (31 + \sqrt{- 4 x^{2} + 16 x + 1089})}{2}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Rewrite $- 1 (31 + \sqrt{- 4 x^{2} + 16 x + 1089})$ as $- (31 + \sqrt{- 4 x^{2} + 16 x + 1089})$ .

$y = \frac{- (31 + \sqrt{- 4 x^{2} + 16 x + 1089})}{2}$

$y + 31 + \frac{4 x - 32}{y} = 0$

$y = \frac{- (31 + \sqrt{- 4 x^{2} + 16 x + 1089})}{2}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Move the negative in front of the fraction.

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y + 31 + \frac{4 x - 32}{y} = 0$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Step 6

The final answer is the combination of both solutions.

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y + 31 + \frac{4 x - 32}{y} = 0$

Step 7

Factor $4$ out of $4 x - 32$ .

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Factor $4$ out of $4 x$ .

$y + 31 + \frac{4 (x) - 32}{y} = 0$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Factor $4$ out of $- 32$ .

$y + 31 + \frac{4 x + 4 \cdot - 8}{y} = 0$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Factor $4$ out of $4 x + 4 \cdot - 8$ .

$y + 31 + \frac{4 (x - 8)}{y} = 0$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y + 31 + \frac{4 (x - 8)}{y} = 0$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Step 8

Find the LCD of the terms in the equation.

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Finding the LCD of a list of values is the same as finding the LCM of the denominators of those values.

$1, 1, y, 1$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

The LCM of one and any expression is the expression.

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Step 9

Multiply each term in $y + 31 + \frac{4 (x - 8)}{y} = 0$ by $y$ to eliminate the fractions.

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Multiply each term in $y + 31 + \frac{4 (x - 8)}{y} = 0$ by $y$ .

$y \cdot y + 31 y + \frac{4 (x - 8)}{y} \cdot y = 0 y$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Simplify the left side.

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Simplify each term.

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Multiply $y$ by $y$ .

$y^{2} + 31 y + \frac{4 (x - 8)}{y} \cdot y = 0 y$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Cancel the common factor of $y$ .

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Cancel the common factor.

$y^{2} + 31 y + \frac{4 (x - 8)}{y} \cdot y = 0 y$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Rewrite the expression.

$y^{2} + 31 y + 4 (x - 8) = 0 y$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y^{2} + 31 y + 4 (x - 8) = 0 y$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Apply the distributive property.

$y^{2} + 31 y + 4 x + 4 \cdot - 8 = 0 y$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Multiply $4$ by $- 8$ .

$y^{2} + 31 y + 4 x - 32 = 0 y$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y^{2} + 31 y + 4 x - 32 = 0 y$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y^{2} + 31 y + 4 x - 32 = 0 y$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}, - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Simplify the right side.

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Multiply $0$ by $y$ .

$y^{2} + 31 y + 4 x - 32 = 0$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y^{2} + 31 y + 4 x - 32 = 0$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}, - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y^{2} + 31 y + 4 x - 32 = 0$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Step 10

Solve the equation.

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Use the quadratic formula to find the solutions.

$\frac{- b \pm \sqrt{b^{2} - 4 (a c)}}{2 a}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Substitute the values $a = 1$ , $b = 31$ , and $c = 4 x - 32$ into the quadratic formula and solve for $y$ .

$\frac{- 31 \pm \sqrt{31^{2} - 4 \cdot (1 \cdot (4 x - 32))}}{2 \cdot 1}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Simplify.

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Simplify the numerator.

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Raise $31$ to the power of $2$ .

$y = \frac{- 31 \pm \sqrt{961 - 4 \cdot 1 \cdot (4 x - 32)}}{2 \cdot 1}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Multiply $- 4$ by $1$ .

$y = \frac{- 31 \pm \sqrt{961 - 4 \cdot (4 x - 32)}}{2 \cdot 1}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Apply the distributive property.

$y = \frac{- 31 \pm \sqrt{961 - 4 (4 x) - 4 \cdot - 32}}{2 \cdot 1}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Multiply $4$ by $- 4$ .

$y = \frac{- 31 \pm \sqrt{961 - 16 x - 4 \cdot - 32}}{2 \cdot 1}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Multiply $- 4$ by $- 32$ .

$y = \frac{- 31 \pm \sqrt{961 - 16 x + 128}}{2 \cdot 1}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Add $961$ and $128$ .

$y = \frac{- 31 \pm \sqrt{- 16 x + 1089}}{2 \cdot 1}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = \frac{- 31 \pm \sqrt{- 16 x + 1089}}{2 \cdot 1}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Multiply $2$ by $1$ .

$y = \frac{- 31 \pm \sqrt{- 16 x + 1089}}{2}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = \frac{- 31 \pm \sqrt{- 16 x + 1089}}{2}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Simplify the expression to solve for the $+$ portion of the $\pm$ .

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Simplify the numerator.

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Raise $31$ to the power of $2$ .

$y = \frac{- 31 \pm \sqrt{961 - 4 \cdot 1 \cdot (4 x - 32)}}{2 \cdot 1}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Multiply $- 4$ by $1$ .

$y = \frac{- 31 \pm \sqrt{961 - 4 \cdot (4 x - 32)}}{2 \cdot 1}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Apply the distributive property.

$y = \frac{- 31 \pm \sqrt{961 - 4 (4 x) - 4 \cdot - 32}}{2 \cdot 1}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Multiply $4$ by $- 4$ .

$y = \frac{- 31 \pm \sqrt{961 - 16 x - 4 \cdot - 32}}{2 \cdot 1}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Multiply $- 4$ by $- 32$ .

$y = \frac{- 31 \pm \sqrt{961 - 16 x + 128}}{2 \cdot 1}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Add $961$ and $128$ .

$y = \frac{- 31 \pm \sqrt{- 16 x + 1089}}{2 \cdot 1}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = \frac{- 31 \pm \sqrt{- 16 x + 1089}}{2 \cdot 1}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Multiply $2$ by $1$ .

$y = \frac{- 31 \pm \sqrt{- 16 x + 1089}}{2}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Change the $\pm$ to $+$ .

$y = \frac{- 31 + \sqrt{- 16 x + 1089}}{2}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Rewrite $- 31$ as $- 1 (31)$ .

$y = \frac{- 1 \cdot 31 + \sqrt{- 16 x + 1089}}{2}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Factor $- 1$ out of $\sqrt{- 16 x + 1089}$ .

$y = \frac{- 1 \cdot 31 - 1 (- \sqrt{- 16 x + 1089})}{2}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Factor $- 1$ out of $- 1 (31) - 1 (- \sqrt{- 16 x + 1089})$ .

$y = \frac{- 1 (31 - \sqrt{- 16 x + 1089})}{2}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Move the negative in front of the fraction.

$y = - \frac{31 - \sqrt{- 16 x + 1089}}{2}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 - \sqrt{- 16 x + 1089}}{2}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Simplify the expression to solve for the $-$ portion of the $\pm$ .

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Simplify the numerator.

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Raise $31$ to the power of $2$ .

$y = \frac{- 31 \pm \sqrt{961 - 4 \cdot 1 \cdot (4 x - 32)}}{2 \cdot 1}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Multiply $- 4$ by $1$ .

$y = \frac{- 31 \pm \sqrt{961 - 4 \cdot (4 x - 32)}}{2 \cdot 1}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Apply the distributive property.

$y = \frac{- 31 \pm \sqrt{961 - 4 (4 x) - 4 \cdot - 32}}{2 \cdot 1}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Multiply $4$ by $- 4$ .

$y = \frac{- 31 \pm \sqrt{961 - 16 x - 4 \cdot - 32}}{2 \cdot 1}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Multiply $- 4$ by $- 32$ .

$y = \frac{- 31 \pm \sqrt{961 - 16 x + 128}}{2 \cdot 1}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Add $961$ and $128$ .

$y = \frac{- 31 \pm \sqrt{- 16 x + 1089}}{2 \cdot 1}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = \frac{- 31 \pm \sqrt{- 16 x + 1089}}{2 \cdot 1}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Multiply $2$ by $1$ .

$y = \frac{- 31 \pm \sqrt{- 16 x + 1089}}{2}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Change the $\pm$ to $-$ .

$y = \frac{- 31 - \sqrt{- 16 x + 1089}}{2}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Factor $- 1$ out of $- 31 - \sqrt{- 16 x + 1089}$ .

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Rewrite $- 31$ as $- 1 (31)$ .

$y = \frac{- 1 \cdot 31 - \sqrt{- 16 x + 1089}}{2}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Factor $- 1$ out of $- \sqrt{- 16 x + 1089}$ .

$y = \frac{- 1 \cdot 31 - (\sqrt{- 16 x + 1089})}{2}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Factor $- 1$ out of $- 1 (31) - (\sqrt{- 16 x + 1089})$ .

$y = \frac{- 1 (31 + \sqrt{- 16 x + 1089})}{2}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Rewrite $- 1 (31 + \sqrt{- 16 x + 1089})$ as $- (31 + \sqrt{- 16 x + 1089})$ .

$y = \frac{- (31 + \sqrt{- 16 x + 1089})}{2}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = \frac{- (31 + \sqrt{- 16 x + 1089})}{2}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Move the negative in front of the fraction.

$y = - \frac{31 + \sqrt{- 16 x + 1089}}{2}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 16 x + 1089}}{2}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

The final answer is the combination of both solutions.

$y = - \frac{31 - \sqrt{- 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 16 x + 1089}}{2}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 - \sqrt{- 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 16 x + 1089}}{2}$

$y = - \frac{31 - \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

$y = - \frac{31 + \sqrt{- 4 x^{2} + 16 x + 1089}}{2}$

Step 11

Create a graph to locate the intersection of the equations. The intersection of the system of equations is the solution.

$(8, 0)$

$(0, 1)$

$(8, - 31)$

$(0, - 32)$

Step 12