Algebra Examples

Find the Points of Intersection y=-0.3x^2+3x , -2x+5.5y=19.5
,
Step 1
Replace all occurrences of with in each equation.
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Step 1.1
Replace all occurrences of in with .
Step 1.2
Simplify the left side.
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Step 1.2.1
Simplify .
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Step 1.2.1.1
Simplify each term.
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Step 1.2.1.1.1
Apply the distributive property.
Step 1.2.1.1.2
Multiply by .
Step 1.2.1.1.3
Multiply by .
Step 1.2.1.2
Add and .
Step 2
Solve for in .
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Step 2.1
Subtract from both sides of the equation.
Step 2.2
Factor out of .
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Step 2.2.1
Factor out of .
Step 2.2.2
Factor out of .
Step 2.2.3
Factor out of .
Step 2.2.4
Factor out of .
Step 2.2.5
Factor out of .
Step 2.3
Divide each term in by and simplify.
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Step 2.3.1
Divide each term in by .
Step 2.3.2
Simplify the left side.
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Step 2.3.2.1
Cancel the common factor of .
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Step 2.3.2.1.1
Cancel the common factor.
Step 2.3.2.1.2
Divide by .
Step 2.3.3
Simplify the right side.
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Step 2.3.3.1
Divide by .
Step 2.4
Use the quadratic formula to find the solutions.
Step 2.5
Substitute the values , , and into the quadratic formula and solve for .
Step 2.6
Simplify.
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Step 2.6.1
Simplify the numerator.
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Step 2.6.1.1
Raise to the power of .
Step 2.6.1.2
Multiply .
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Step 2.6.1.2.1
Multiply by .
Step 2.6.1.2.2
Multiply by .
Step 2.6.1.3
Subtract from .
Step 2.6.1.4
Rewrite as .
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Step 2.6.1.4.1
Factor out of .
Step 2.6.1.4.2
Rewrite as .
Step 2.6.1.5
Pull terms out from under the radical.
Step 2.6.2
Multiply by .
Step 2.6.3
Simplify .
Step 2.7
Simplify the expression to solve for the portion of the .
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Step 2.7.1
Simplify the numerator.
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Step 2.7.1.1
Raise to the power of .
Step 2.7.1.2
Multiply .
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Step 2.7.1.2.1
Multiply by .
Step 2.7.1.2.2
Multiply by .
Step 2.7.1.3
Subtract from .
Step 2.7.1.4
Rewrite as .
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Step 2.7.1.4.1
Factor out of .
Step 2.7.1.4.2
Rewrite as .
Step 2.7.1.5
Pull terms out from under the radical.
Step 2.7.2
Multiply by .
Step 2.7.3
Simplify .
Step 2.7.4
Change the to .
Step 2.8
Simplify the expression to solve for the portion of the .
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Step 2.8.1
Simplify the numerator.
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Step 2.8.1.1
Raise to the power of .
Step 2.8.1.2
Multiply .
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Step 2.8.1.2.1
Multiply by .
Step 2.8.1.2.2
Multiply by .
Step 2.8.1.3
Subtract from .
Step 2.8.1.4
Rewrite as .
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Step 2.8.1.4.1
Factor out of .
Step 2.8.1.4.2
Rewrite as .
Step 2.8.1.5
Pull terms out from under the radical.
Step 2.8.2
Multiply by .
Step 2.8.3
Simplify .
Step 2.8.4
Change the to .
Step 2.9
The final answer is the combination of both solutions.
Step 3
Replace all occurrences of with in each equation.
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Step 3.1
Replace all occurrences of in with .
Step 3.2
Simplify the right side.
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Step 3.2.1
Simplify .
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Step 3.2.1.1
Simplify each term.
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Step 3.2.1.1.1
Apply the product rule to .
Step 3.2.1.1.2
Raise to the power of .
Step 3.2.1.1.3
Cancel the common factor of .
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Step 3.2.1.1.3.1
Factor out of .
Step 3.2.1.1.3.2
Factor out of .
Step 3.2.1.1.3.3
Cancel the common factor.
Step 3.2.1.1.3.4
Rewrite the expression.
Step 3.2.1.1.4
Rewrite as .
Step 3.2.1.1.5
Expand using the FOIL Method.
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Step 3.2.1.1.5.1
Apply the distributive property.
Step 3.2.1.1.5.2
Apply the distributive property.
Step 3.2.1.1.5.3
Apply the distributive property.
Step 3.2.1.1.6
Simplify and combine like terms.
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Step 3.2.1.1.6.1
Simplify each term.
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Step 3.2.1.1.6.1.1
Multiply by .
Step 3.2.1.1.6.1.2
Move to the left of .
Step 3.2.1.1.6.1.3
Combine using the product rule for radicals.
Step 3.2.1.1.6.1.4
Multiply by .
Step 3.2.1.1.6.1.5
Rewrite as .
Step 3.2.1.1.6.1.6
Pull terms out from under the radical, assuming positive real numbers.
Step 3.2.1.1.6.2
Add and .
Step 3.2.1.1.6.3
Add and .
Step 3.2.1.1.7
Cancel the common factor of and .
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Step 3.2.1.1.7.1
Factor out of .
Step 3.2.1.1.7.2
Factor out of .
Step 3.2.1.1.7.3
Factor out of .
Step 3.2.1.1.7.4
Cancel the common factors.
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Step 3.2.1.1.7.4.1
Factor out of .
Step 3.2.1.1.7.4.2
Cancel the common factor.
Step 3.2.1.1.7.4.3
Rewrite the expression.
Step 3.2.1.1.8
Rewrite as .
Step 3.2.1.1.9
Cancel the common factor of .
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Step 3.2.1.1.9.1
Factor out of .
Step 3.2.1.1.9.2
Cancel the common factor.
Step 3.2.1.1.9.3
Rewrite the expression.
Step 3.2.1.2
To write as a fraction with a common denominator, multiply by .
Step 3.2.1.3
Write each expression with a common denominator of , by multiplying each by an appropriate factor of .
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Step 3.2.1.3.1
Multiply by .
Step 3.2.1.3.2
Multiply by .
Step 3.2.1.4
Combine the numerators over the common denominator.
Step 3.2.1.5
Simplify the numerator.
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Step 3.2.1.5.1
Apply the distributive property.
Step 3.2.1.5.2
Multiply by .
Step 3.2.1.5.3
Multiply by .
Step 3.2.1.5.4
Apply the distributive property.
Step 3.2.1.5.5
Multiply by .
Step 3.2.1.5.6
Move to the left of .
Step 3.2.1.5.7
Add and .
Step 3.2.1.5.8
Add and .
Step 4
Replace all occurrences of with in each equation.
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Step 4.1
Replace all occurrences of in with .
Step 4.2
Simplify the right side.
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Step 4.2.1
Simplify .
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Step 4.2.1.1
Simplify each term.
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Step 4.2.1.1.1
Apply the product rule to .
Step 4.2.1.1.2
Raise to the power of .
Step 4.2.1.1.3
Cancel the common factor of .
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Step 4.2.1.1.3.1
Factor out of .
Step 4.2.1.1.3.2
Factor out of .
Step 4.2.1.1.3.3
Cancel the common factor.
Step 4.2.1.1.3.4
Rewrite the expression.
Step 4.2.1.1.4
Rewrite as .
Step 4.2.1.1.5
Expand using the FOIL Method.
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Step 4.2.1.1.5.1
Apply the distributive property.
Step 4.2.1.1.5.2
Apply the distributive property.
Step 4.2.1.1.5.3
Apply the distributive property.
Step 4.2.1.1.6
Simplify and combine like terms.
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Step 4.2.1.1.6.1
Simplify each term.
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Step 4.2.1.1.6.1.1
Multiply by .
Step 4.2.1.1.6.1.2
Multiply by .
Step 4.2.1.1.6.1.3
Multiply by .
Step 4.2.1.1.6.1.4
Multiply .
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Step 4.2.1.1.6.1.4.1
Multiply by .
Step 4.2.1.1.6.1.4.2
Multiply by .
Step 4.2.1.1.6.1.4.3
Raise to the power of .
Step 4.2.1.1.6.1.4.4
Raise to the power of .
Step 4.2.1.1.6.1.4.5
Use the power rule to combine exponents.
Step 4.2.1.1.6.1.4.6
Add and .
Step 4.2.1.1.6.1.5
Rewrite as .
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Step 4.2.1.1.6.1.5.1
Use to rewrite as .
Step 4.2.1.1.6.1.5.2
Apply the power rule and multiply exponents, .
Step 4.2.1.1.6.1.5.3
Combine and .
Step 4.2.1.1.6.1.5.4
Cancel the common factor of .
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Step 4.2.1.1.6.1.5.4.1
Cancel the common factor.
Step 4.2.1.1.6.1.5.4.2
Rewrite the expression.
Step 4.2.1.1.6.1.5.5
Evaluate the exponent.
Step 4.2.1.1.6.2
Add and .
Step 4.2.1.1.6.3
Subtract from .
Step 4.2.1.1.7
Cancel the common factor of and .
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Step 4.2.1.1.7.1
Factor out of .
Step 4.2.1.1.7.2
Factor out of .
Step 4.2.1.1.7.3
Factor out of .
Step 4.2.1.1.7.4
Cancel the common factors.
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Step 4.2.1.1.7.4.1
Factor out of .
Step 4.2.1.1.7.4.2
Cancel the common factor.
Step 4.2.1.1.7.4.3
Rewrite the expression.
Step 4.2.1.1.8
Rewrite as .
Step 4.2.1.1.9
Cancel the common factor of .
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Step 4.2.1.1.9.1
Factor out of .
Step 4.2.1.1.9.2
Cancel the common factor.
Step 4.2.1.1.9.3
Rewrite the expression.
Step 4.2.1.2
To write as a fraction with a common denominator, multiply by .
Step 4.2.1.3
Write each expression with a common denominator of , by multiplying each by an appropriate factor of .
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Step 4.2.1.3.1
Multiply by .
Step 4.2.1.3.2
Multiply by .
Step 4.2.1.4
Combine the numerators over the common denominator.
Step 4.2.1.5
Simplify the numerator.
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Step 4.2.1.5.1
Apply the distributive property.
Step 4.2.1.5.2
Multiply by .
Step 4.2.1.5.3
Multiply by .
Step 4.2.1.5.4
Apply the distributive property.
Step 4.2.1.5.5
Multiply by .
Step 4.2.1.5.6
Multiply by .
Step 4.2.1.5.7
Add and .
Step 4.2.1.5.8
Subtract from .
Step 5
The solution to the system is the complete set of ordered pairs that are valid solutions.
Step 6
The result can be shown in multiple forms.
Point Form:
Equation Form:
Step 7