Finite Math Examples

Solve by Substitution y=x^2+2x-3 , 1/3x-y=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
Combine and .
Step 1.2.1.1.2
Apply the distributive property.
Step 1.2.1.1.3
Simplify.
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Step 1.2.1.1.3.1
Multiply by .
Step 1.2.1.1.3.2
Multiply by .
Step 1.2.1.2
To write as a fraction with a common denominator, multiply by .
Step 1.2.1.3
Combine and .
Step 1.2.1.4
Combine the numerators over the common denominator.
Step 1.2.1.5
Find the common denominator.
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Step 1.2.1.5.1
Write as a fraction with denominator .
Step 1.2.1.5.2
Multiply by .
Step 1.2.1.5.3
Multiply by .
Step 1.2.1.5.4
Write as a fraction with denominator .
Step 1.2.1.5.5
Multiply by .
Step 1.2.1.5.6
Multiply by .
Step 1.2.1.6
Combine the numerators over the common denominator.
Step 1.2.1.7
Simplify each term.
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Step 1.2.1.7.1
Multiply by .
Step 1.2.1.7.2
Multiply by .
Step 1.2.1.7.3
Multiply by .
Step 1.2.1.8
Simplify terms.
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Step 1.2.1.8.1
Subtract from .
Step 1.2.1.8.2
Factor out of .
Step 1.2.1.8.3
Factor out of .
Step 1.2.1.8.4
Factor out of .
Step 1.2.1.8.5
Rewrite as .
Step 1.2.1.8.6
Factor out of .
Step 1.2.1.8.7
Simplify the expression.
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Step 1.2.1.8.7.1
Rewrite as .
Step 1.2.1.8.7.2
Move the negative in front of the fraction.
Step 2
Solve for in .
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Step 2.1
Multiply both sides of the equation by .
Step 2.2
Simplify both sides of the equation.
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Step 2.2.1
Simplify the left side.
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Step 2.2.1.1
Simplify .
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Step 2.2.1.1.1
Cancel the common factor of .
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Step 2.2.1.1.1.1
Move the leading negative in into the numerator.
Step 2.2.1.1.1.2
Factor out of .
Step 2.2.1.1.1.3
Cancel the common factor.
Step 2.2.1.1.1.4
Rewrite the expression.
Step 2.2.1.1.2
Multiply.
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Step 2.2.1.1.2.1
Multiply by .
Step 2.2.1.1.2.2
Multiply by .
Step 2.2.2
Simplify the right side.
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Step 2.2.2.1
Multiply by .
Step 2.3
Move all terms to the left side of the equation and simplify.
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Step 2.3.1
Add to both sides of the equation.
Step 2.3.2
Add and .
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 .
Step 2.6.1.5
Rewrite as .
Step 2.6.1.6
Rewrite as .
Step 2.6.2
Multiply by .
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 .
Step 2.7.1.5
Rewrite as .
Step 2.7.1.6
Rewrite as .
Step 2.7.2
Multiply by .
Step 2.7.3
Change the to .
Step 2.7.4
Rewrite as .
Step 2.7.5
Factor out of .
Step 2.7.6
Factor out of .
Step 2.7.7
Move the negative in front of the fraction.
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 .
Step 2.8.1.5
Rewrite as .
Step 2.8.1.6
Rewrite as .
Step 2.8.2
Multiply by .
Step 2.8.3
Change the to .
Step 2.8.4
Rewrite as .
Step 2.8.5
Factor out of .
Step 2.8.6
Factor out of .
Step 2.8.7
Move the negative in front of the fraction.
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
Use the power rule to distribute the exponent.
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Step 3.2.1.1.1.1
Apply the product rule to .
Step 3.2.1.1.1.2
Apply the product rule to .
Step 3.2.1.1.2
Raise to the power of .
Step 3.2.1.1.3
Multiply by .
Step 3.2.1.1.4
Raise to the power of .
Step 3.2.1.1.5
Rewrite as .
Step 3.2.1.1.6
Expand using the FOIL Method.
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Step 3.2.1.1.6.1
Apply the distributive property.
Step 3.2.1.1.6.2
Apply the distributive property.
Step 3.2.1.1.6.3
Apply the distributive property.
Step 3.2.1.1.7
Simplify and combine like terms.
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Step 3.2.1.1.7.1
Simplify each term.
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Step 3.2.1.1.7.1.1
Multiply by .
Step 3.2.1.1.7.1.2
Multiply by .
Step 3.2.1.1.7.1.3
Multiply by .
Step 3.2.1.1.7.1.4
Multiply .
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Step 3.2.1.1.7.1.4.1
Multiply by .
Step 3.2.1.1.7.1.4.2
Multiply by .
Step 3.2.1.1.7.1.4.3
Raise to the power of .
Step 3.2.1.1.7.1.4.4
Raise to the power of .
Step 3.2.1.1.7.1.4.5
Use the power rule to combine exponents.
Step 3.2.1.1.7.1.4.6
Add and .
Step 3.2.1.1.7.1.4.7
Raise to the power of .
Step 3.2.1.1.7.1.4.8
Raise to the power of .
Step 3.2.1.1.7.1.4.9
Use the power rule to combine exponents.
Step 3.2.1.1.7.1.4.10
Add and .
Step 3.2.1.1.7.1.5
Rewrite as .
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Step 3.2.1.1.7.1.5.1
Use to rewrite as .
Step 3.2.1.1.7.1.5.2
Apply the power rule and multiply exponents, .
Step 3.2.1.1.7.1.5.3
Combine and .
Step 3.2.1.1.7.1.5.4
Cancel the common factor of .
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Step 3.2.1.1.7.1.5.4.1
Cancel the common factor.
Step 3.2.1.1.7.1.5.4.2
Rewrite the expression.
Step 3.2.1.1.7.1.5.5
Evaluate the exponent.
Step 3.2.1.1.7.1.6
Rewrite as .
Step 3.2.1.1.7.1.7
Multiply by .
Step 3.2.1.1.7.2
Subtract from .
Step 3.2.1.1.7.3
Subtract from .
Step 3.2.1.1.8
Reorder and .
Step 3.2.1.1.9
Cancel the common factor of and .
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Step 3.2.1.1.9.1
Factor out of .
Step 3.2.1.1.9.2
Factor out of .
Step 3.2.1.1.9.3
Factor out of .
Step 3.2.1.1.9.4
Cancel the common factors.
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Step 3.2.1.1.9.4.1
Factor out of .
Step 3.2.1.1.9.4.2
Cancel the common factor.
Step 3.2.1.1.9.4.3
Rewrite the expression.
Step 3.2.1.1.10
Cancel the common factor of .
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Step 3.2.1.1.10.1
Move the leading negative in into the numerator.
Step 3.2.1.1.10.2
Factor out of .
Step 3.2.1.1.10.3
Cancel the common factor.
Step 3.2.1.1.10.4
Rewrite the expression.
Step 3.2.1.1.11
Move the negative in front of the fraction.
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
To write as a fraction with a common denominator, multiply by .
Step 3.2.1.6
Combine and .
Step 3.2.1.7
Combine the numerators over the common denominator.
Step 3.2.1.8
Rewrite as .
Step 3.2.1.9
Factor out of .
Step 3.2.1.10
Factor out of .
Step 3.2.1.11
Move the negative in front of the fraction.
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
Use the power rule to distribute the exponent.
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Step 4.2.1.1.1.1
Apply the product rule to .
Step 4.2.1.1.1.2
Apply the product rule to .
Step 4.2.1.1.2
Raise to the power of .
Step 4.2.1.1.3
Multiply by .
Step 4.2.1.1.4
Raise to the power of .
Step 4.2.1.1.5
Rewrite as .
Step 4.2.1.1.6
Expand using the FOIL Method.
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Step 4.2.1.1.6.1
Apply the distributive property.
Step 4.2.1.1.6.2
Apply the distributive property.
Step 4.2.1.1.6.3
Apply the distributive property.
Step 4.2.1.1.7
Simplify and combine like terms.
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Step 4.2.1.1.7.1
Simplify each term.
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Step 4.2.1.1.7.1.1
Multiply by .
Step 4.2.1.1.7.1.2
Move to the left of .
Step 4.2.1.1.7.1.3
Multiply .
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Step 4.2.1.1.7.1.3.1
Raise to the power of .
Step 4.2.1.1.7.1.3.2
Raise to the power of .
Step 4.2.1.1.7.1.3.3
Use the power rule to combine exponents.
Step 4.2.1.1.7.1.3.4
Add and .
Step 4.2.1.1.7.1.3.5
Raise to the power of .
Step 4.2.1.1.7.1.3.6
Raise to the power of .
Step 4.2.1.1.7.1.3.7
Use the power rule to combine exponents.
Step 4.2.1.1.7.1.3.8
Add and .
Step 4.2.1.1.7.1.4
Rewrite as .
Step 4.2.1.1.7.1.5
Rewrite as .
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Step 4.2.1.1.7.1.5.1
Use to rewrite as .
Step 4.2.1.1.7.1.5.2
Apply the power rule and multiply exponents, .
Step 4.2.1.1.7.1.5.3
Combine and .
Step 4.2.1.1.7.1.5.4
Cancel the common factor of .
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Step 4.2.1.1.7.1.5.4.1
Cancel the common factor.
Step 4.2.1.1.7.1.5.4.2
Rewrite the expression.
Step 4.2.1.1.7.1.5.5
Evaluate the exponent.
Step 4.2.1.1.7.1.6
Multiply by .
Step 4.2.1.1.7.2
Subtract from .
Step 4.2.1.1.7.3
Add and .
Step 4.2.1.1.8
Reorder and .
Step 4.2.1.1.9
Cancel the common factor of and .
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Step 4.2.1.1.9.1
Factor out of .
Step 4.2.1.1.9.2
Factor out of .
Step 4.2.1.1.9.3
Factor out of .
Step 4.2.1.1.9.4
Cancel the common factors.
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Step 4.2.1.1.9.4.1
Factor out of .
Step 4.2.1.1.9.4.2
Cancel the common factor.
Step 4.2.1.1.9.4.3
Rewrite the expression.
Step 4.2.1.1.10
Cancel the common factor of .
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Step 4.2.1.1.10.1
Move the leading negative in into the numerator.
Step 4.2.1.1.10.2
Factor out of .
Step 4.2.1.1.10.3
Cancel the common factor.
Step 4.2.1.1.10.4
Rewrite the expression.
Step 4.2.1.1.11
Move the negative in front of the fraction.
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
To write as a fraction with a common denominator, multiply by .
Step 4.2.1.6
Combine and .
Step 4.2.1.7
Combine the numerators over the common denominator.
Step 4.2.1.8
Rewrite as .
Step 4.2.1.9
Factor out of .
Step 4.2.1.10
Factor out of .
Step 4.2.1.11
Move the negative in front of the fraction.
Step 5
List all of the solutions.
Step 6