Algebra Examples

$\frac{f {(x - 6)}^{2} + h - x^{2} - 6}{h}$

Step 1

Differentiate using the Quotient Rule which states that $\frac{d}{d x} [\frac{f (x)}{g (x)}]$ is $\frac{g (x) \frac{d}{d x} [f (x)] - f (x) \frac{d}{d x} [g (x)]}{{g (x)}^{2}}$ where $f (x) = f {(x - 6)}^{2} + h - x^{2} - 6$ and $g (x) = h$ .

$\frac{h \frac{d}{d x} [f {(x - 6)}^{2} + h - x^{2} - 6] - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 2

Rewrite ${(x - 6)}^{2}$ as $(x - 6) (x - 6)$ .

$\frac{h \frac{d}{d x} [f ((x - 6) (x - 6)) + h - x^{2} - 6] - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 3

Expand $(x - 6) (x - 6)$ using the FOIL Method.

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Step 3.1

Apply the distributive property.

$\frac{h \frac{d}{d x} [f (x (x - 6) - 6 (x - 6)) + h - x^{2} - 6] - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 3.2

Apply the distributive property.

$\frac{h \frac{d}{d x} [f (x \cdot x + x \cdot - 6 - 6 (x - 6)) + h - x^{2} - 6] - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 3.3

Apply the distributive property.

$\frac{h \frac{d}{d x} [f (x \cdot x + x \cdot - 6 - 6 x - 6 \cdot - 6) + h - x^{2} - 6] - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 4

Simplify and combine like terms.

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Step 4.1

Simplify each term.

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Step 4.1.1

Multiply $x$ by $x$ .

$\frac{h \frac{d}{d x} [f (x^{2} + x \cdot - 6 - 6 x - 6 \cdot - 6) + h - x^{2} - 6] - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 4.1.2

Move $- 6$ to the left of $x$ .

$\frac{h \frac{d}{d x} [f (x^{2} - 6 \cdot x - 6 x - 6 \cdot - 6) + h - x^{2} - 6] - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 4.1.3

Multiply $- 6$ by $- 6$ .

$\frac{h \frac{d}{d x} [f (x^{2} - 6 x - 6 x + 36) + h - x^{2} - 6] - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 4.2

Subtract $6 x$ from $- 6 x$ .

$\frac{h \frac{d}{d x} [f (x^{2} - 12 x + 36) + h - x^{2} - 6] - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 5

By the Sum Rule, the derivative of $f (x^{2} - 12 x + 36) + h - x^{2} - 6$ with respect to $x$ is $\frac{d}{d x} [f (x^{2} - 12 x + 36)] + \frac{d}{d x} [h] + \frac{d}{d x} [- x^{2}] + \frac{d}{d x} [- 6]$ .

$\frac{h (\frac{d}{d x} [f (x^{2} - 12 x + 36)] + \frac{d}{d x} [h] + \frac{d}{d x} [- x^{2}] + \frac{d}{d x} [- 6]) - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 6

Evaluate $\frac{d}{d x} [f (x^{2} - 12 x + 36)]$ .

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Step 6.1

Since $f$ is constant with respect to $x$ , the derivative of $f (x^{2} - 12 x + 36)$ with respect to $x$ is $f \frac{d}{d x} [x^{2} - 12 x + 36]$ .

$\frac{h (f \frac{d}{d x} [x^{2} - 12 x + 36] + \frac{d}{d x} [h] + \frac{d}{d x} [- x^{2}] + \frac{d}{d x} [- 6]) - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 6.2

By the Sum Rule, the derivative of $x^{2} - 12 x + 36$ with respect to $x$ is $\frac{d}{d x} [x^{2}] + \frac{d}{d x} [- 12 x] + \frac{d}{d x} [36]$ .

$\frac{h (f (\frac{d}{d x} [x^{2}] + \frac{d}{d x} [- 12 x] + \frac{d}{d x} [36]) + \frac{d}{d x} [h] + \frac{d}{d x} [- x^{2}] + \frac{d}{d x} [- 6]) - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 6.3

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 2$ .

$\frac{h (f (2 x + \frac{d}{d x} [- 12 x] + \frac{d}{d x} [36]) + \frac{d}{d x} [h] + \frac{d}{d x} [- x^{2}] + \frac{d}{d x} [- 6]) - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 6.4

Since $- 12$ is constant with respect to $x$ , the derivative of $- 12 x$ with respect to $x$ is $- 12 \frac{d}{d x} [x]$ .

$\frac{h (f (2 x - 12 \frac{d}{d x} [x] + \frac{d}{d x} [36]) + \frac{d}{d x} [h] + \frac{d}{d x} [- x^{2}] + \frac{d}{d x} [- 6]) - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 6.5

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 1$ .

$\frac{h (f (2 x - 12 \cdot 1 + \frac{d}{d x} [36]) + \frac{d}{d x} [h] + \frac{d}{d x} [- x^{2}] + \frac{d}{d x} [- 6]) - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 6.6

Since $36$ is constant with respect to $x$ , the derivative of $36$ with respect to $x$ is $0$ .

$\frac{h (f (2 x - 12 \cdot 1 + 0) + \frac{d}{d x} [h] + \frac{d}{d x} [- x^{2}] + \frac{d}{d x} [- 6]) - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 6.7

Multiply $- 12$ by $1$ .

$\frac{h (f (2 x - 12 + 0) + \frac{d}{d x} [h] + \frac{d}{d x} [- x^{2}] + \frac{d}{d x} [- 6]) - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 6.8

Add $2 x - 12$ and $0$ .

$\frac{h (f (2 x - 12) + \frac{d}{d x} [h] + \frac{d}{d x} [- x^{2}] + \frac{d}{d x} [- 6]) - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 7

Since $h$ is constant with respect to $x$ , the derivative of $h$ with respect to $x$ is $0$ .

$\frac{h (f (2 x - 12) + 0 + \frac{d}{d x} [- x^{2}] + \frac{d}{d x} [- 6]) - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 8

Evaluate $\frac{d}{d x} [- x^{2}]$ .

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Step 8.1

Since $- 1$ is constant with respect to $x$ , the derivative of $- x^{2}$ with respect to $x$ is $- \frac{d}{d x} [x^{2}]$ .

$\frac{h (f (2 x - 12) + 0 - \frac{d}{d x} [x^{2}] + \frac{d}{d x} [- 6]) - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 8.2

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 2$ .

$\frac{h (f (2 x - 12) + 0 - (2 x) + \frac{d}{d x} [- 6]) - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 8.3

Multiply $2$ by $- 1$ .

$\frac{h (f (2 x - 12) + 0 - 2 x + \frac{d}{d x} [- 6]) - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 9

Since $- 6$ is constant with respect to $x$ , the derivative of $- 6$ with respect to $x$ is $0$ .

$\frac{h (f (2 x - 12) + 0 - 2 x + 0) - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 10

Simplify.

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Step 10.1

Apply the distributive property.

$\frac{h (f (2 x) + f \cdot - 12 + 0 - 2 x + 0) - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 10.2

Combine terms.

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Step 10.2.1

Move $2$ to the left of $f$ .

$\frac{h (2 \cdot f x + f \cdot - 12 + 0 - 2 x + 0) - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 10.2.2

Move $- 12$ to the left of $f$ .

$\frac{h (2 f x - 12 \cdot f + 0 - 2 x + 0) - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 10.2.3

Add $2 f x - 12 f$ and $0$ .

$\frac{h (2 f x - 12 f - 2 x + 0) - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 10.2.4

Add $2 f x - 12 f - 2 x$ and $0$ .

$\frac{h (2 f x - 12 f - 2 x) - (f {(x - 6)}^{2} + h - x^{2} - 6) \frac{d}{d x} [h]}{h^{2}}$

Step 11

Since $h$ is constant with respect to $x$ , the derivative of $h$ with respect to $x$ is $0$ .

$\frac{h (2 f x - 12 f - 2 x) - (f {(x - 6)}^{2} + h - x^{2} - 6) \cdot 0}{h^{2}}$

Step 12

Simplify.

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Step 12.1

Apply the distributive property.

$\frac{h (2 f x) + h (- 12 f) + h (- 2 x) - (f {(x - 6)}^{2} + h - x^{2} - 6) \cdot 0}{h^{2}}$

Step 12.2

Apply the distributive property.

$\frac{h (2 f x) + h (- 12 f) + h (- 2 x) + (- (f {(x - 6)}^{2}) - h - - x^{2} - - 6) \cdot 0}{h^{2}}$

Step 12.3

Apply the distributive property.

$\frac{h (2 f x) + h (- 12 f) + h (- 2 x) - (f {(x - 6)}^{2}) \cdot 0 - h \cdot 0 - - x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4

Simplify the numerator.

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Step 12.4.1

Simplify each term.

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Step 12.4.1.1

Rewrite using the commutative property of multiplication.

$\frac{2 h f x + h (- 12 f) + h (- 2 x) - (f {(x - 6)}^{2}) \cdot 0 - h \cdot 0 - - x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.2

Rewrite using the commutative property of multiplication.

$\frac{2 h f x - 12 h f + h (- 2 x) - (f {(x - 6)}^{2}) \cdot 0 - h \cdot 0 - - x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.3

Rewrite using the commutative property of multiplication.

$\frac{2 h f x - 12 h f - 2 h x - (f {(x - 6)}^{2}) \cdot 0 - h \cdot 0 - - x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.4

Rewrite ${(x - 6)}^{2}$ as $(x - 6) (x - 6)$ .

$\frac{2 h f x - 12 h f - 2 h x - (f ((x - 6) (x - 6))) \cdot 0 - h \cdot 0 - - x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.5

Expand $(x - 6) (x - 6)$ using the FOIL Method.

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Step 12.4.1.5.1

Apply the distributive property.

$\frac{2 h f x - 12 h f - 2 h x - (f (x (x - 6) - 6 (x - 6))) \cdot 0 - h \cdot 0 - - x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.5.2

Apply the distributive property.

$\frac{2 h f x - 12 h f - 2 h x - (f (x \cdot x + x \cdot - 6 - 6 (x - 6))) \cdot 0 - h \cdot 0 - - x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.5.3

Apply the distributive property.

$\frac{2 h f x - 12 h f - 2 h x - (f (x \cdot x + x \cdot - 6 - 6 x - 6 \cdot - 6)) \cdot 0 - h \cdot 0 - - x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.6

Simplify and combine like terms.

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Step 12.4.1.6.1

Simplify each term.

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Step 12.4.1.6.1.1

Multiply $x$ by $x$ .

$\frac{2 h f x - 12 h f - 2 h x - (f (x^{2} + x \cdot - 6 - 6 x - 6 \cdot - 6)) \cdot 0 - h \cdot 0 - - x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.6.1.2

Move $- 6$ to the left of $x$ .

$\frac{2 h f x - 12 h f - 2 h x - (f (x^{2} - 6 \cdot x - 6 x - 6 \cdot - 6)) \cdot 0 - h \cdot 0 - - x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.6.1.3

Multiply $- 6$ by $- 6$ .

$\frac{2 h f x - 12 h f - 2 h x - (f (x^{2} - 6 x - 6 x + 36)) \cdot 0 - h \cdot 0 - - x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.6.2

Subtract $6 x$ from $- 6 x$ .

$\frac{2 h f x - 12 h f - 2 h x - (f (x^{2} - 12 x + 36)) \cdot 0 - h \cdot 0 - - x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.7

Apply the distributive property.

$\frac{2 h f x - 12 h f - 2 h x - (f x^{2} + f (- 12 x) + f \cdot 36) \cdot 0 - h \cdot 0 - - x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.8

Simplify.

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Step 12.4.1.8.1

Rewrite using the commutative property of multiplication.

$\frac{2 h f x - 12 h f - 2 h x - (f x^{2} - 12 f x + f \cdot 36) \cdot 0 - h \cdot 0 - - x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.8.2

Move $36$ to the left of $f$ .

$\frac{2 h f x - 12 h f - 2 h x - (f x^{2} - 12 f x + 36 \cdot f) \cdot 0 - h \cdot 0 - - x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.9

Apply the distributive property.

$\frac{2 h f x - 12 h f - 2 h x + (- (f x^{2}) - (- 12 f x) - (36 f)) \cdot 0 - h \cdot 0 - - x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.10

Simplify.

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Step 12.4.1.10.1

Multiply $- 12$ by $- 1$ .

$\frac{2 h f x - 12 h f - 2 h x + (- f x^{2} + 12 (f x) - (36 f)) \cdot 0 - h \cdot 0 - - x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.10.2

Multiply $36$ by $- 1$ .

$\frac{2 h f x - 12 h f - 2 h x + (- f x^{2} + 12 (f x) - 36 f) \cdot 0 - h \cdot 0 - - x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.11

Multiply $- f x^{2} + 12 f x - 36 f$ by $0$ .

$\frac{2 h f x - 12 h f - 2 h x + 0 - h \cdot 0 - - x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.12

Multiply $- h \cdot 0$ .

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Step 12.4.1.12.1

Multiply $0$ by $- 1$ .

$\frac{2 h f x - 12 h f - 2 h x + 0 + 0 h - - x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.12.2

Multiply $0$ by $h$ .

$\frac{2 h f x - 12 h f - 2 h x + 0 + 0 - - x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.13

Multiply $- - x^{2}$ .

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Step 12.4.1.13.1

Multiply $- 1$ by $- 1$ .

$\frac{2 h f x - 12 h f - 2 h x + 0 + 0 + 1 x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.13.2

Multiply $x^{2}$ by $1$ .

$\frac{2 h f x - 12 h f - 2 h x + 0 + 0 + x^{2} \cdot 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.14

Multiply $x^{2}$ by $0$ .

$\frac{2 h f x - 12 h f - 2 h x + 0 + 0 + 0 - - 6 \cdot 0}{h^{2}}$

Step 12.4.1.15

Multiply $- - 6 \cdot 0$ .

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Step 12.4.1.15.1

Multiply $- 1$ by $- 6$ .

$\frac{2 h f x - 12 h f - 2 h x + 0 + 0 + 0 + 6 \cdot 0}{h^{2}}$

Step 12.4.1.15.2

Multiply $6$ by $0$ .

$\frac{2 h f x - 12 h f - 2 h x + 0 + 0 + 0 + 0}{h^{2}}$

Step 12.4.2

Combine the opposite terms in $2 h f x - 12 h f - 2 h x + 0 + 0 + 0 + 0$ .

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Step 12.4.2.1

Add $2 h f x - 12 h f - 2 h x$ and $0$ .

$\frac{2 h f x - 12 h f - 2 h x + 0 + 0 + 0}{h^{2}}$

Step 12.4.2.2

Add $2 h f x - 12 h f - 2 h x$ and $0$ .

$\frac{2 h f x - 12 h f - 2 h x + 0 + 0}{h^{2}}$

Step 12.4.2.3

Add $2 h f x - 12 h f - 2 h x$ and $0$ .

$\frac{2 h f x - 12 h f - 2 h x + 0}{h^{2}}$

Step 12.4.2.4

Add $2 h f x - 12 h f - 2 h x$ and $0$ .

$\frac{2 h f x - 12 h f - 2 h x}{h^{2}}$

Step 12.5

Reorder terms.

$\frac{2 f h x - 12 f h - 2 h x}{h^{2}}$

Step 12.6

Factor $2 h$ out of $2 f h x - 12 f h - 2 h x$ .

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Step 12.6.1

Factor $2 h$ out of $2 f h x$ .

$\frac{2 h (f x) - 12 f h - 2 h x}{h^{2}}$

Step 12.6.2

Factor $2 h$ out of $- 12 f h$ .

$\frac{2 h (f x) + 2 h (- 6 f) - 2 h x}{h^{2}}$

Step 12.6.3

Factor $2 h$ out of $- 2 h x$ .

$\frac{2 h (f x) + 2 h (- 6 f) + 2 h (- x)}{h^{2}}$

Step 12.6.4

Factor $2 h$ out of $2 h (f x) + 2 h (- 6 f)$ .

$\frac{2 h (f x - 6 f) + 2 h (- x)}{h^{2}}$

Step 12.6.5

Factor $2 h$ out of $2 h (f x - 6 f) + 2 h (- x)$ .

$\frac{2 h (f x - 6 f - x)}{h^{2}}$

Step 12.7

Cancel the common factor of $h$ and $h^{2}$ .

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Step 12.7.1

Factor $h$ out of $2 h (f x - 6 f - x)$ .

$\frac{h (2 (f x - 6 f - x))}{h^{2}}$

Step 12.7.2

Cancel the common factors.

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Step 12.7.2.1

Factor $h$ out of $h^{2}$ .

$\frac{h (2 (f x - 6 f - x))}{h \cdot h}$

Step 12.7.2.2

Cancel the common factor.

$\frac{h (2 (f x - 6 f - x))}{h \cdot h}$

Step 12.7.2.3

Rewrite the expression.

$\frac{2 (f x - 6 f - x)}{h}$