Finite Math Examples

Solve by Completing the Square x^2-3x+15=3
Step 1
Move all terms not containing to the right side of the equation.
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Step 1.1
Subtract from both sides of the equation.
Step 1.2
Subtract from .
Step 2
To create a trinomial square on the left side of the equation, find a value that is equal to the square of half of .
Step 3
Add the term to each side of the equation.
Step 4
Simplify the equation.
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Step 4.1
Simplify the left side.
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Step 4.1.1
Simplify each term.
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Step 4.1.1.1
Use the power rule to distribute the exponent.
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Step 4.1.1.1.1
Apply the product rule to .
Step 4.1.1.1.2
Apply the product rule to .
Step 4.1.1.2
Raise to the power of .
Step 4.1.1.3
Multiply by .
Step 4.1.1.4
Raise to the power of .
Step 4.1.1.5
Raise to the power of .
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
Raise to the power of .
Step 4.2.1.2
To write as a fraction with a common denominator, multiply by .
Step 4.2.1.3
Combine and .
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
Multiply by .
Step 4.2.1.5.2
Add and .
Step 4.2.1.6
Move the negative in front of the fraction.
Step 5
Factor the perfect trinomial square into .
Step 6
Solve the equation for .
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Step 6.1
Take the specified root of both sides of the equation to eliminate the exponent on the left side.
Step 6.2
Simplify .
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Step 6.2.1
Rewrite as .
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Step 6.2.1.1
Rewrite as .
Step 6.2.1.2
Factor the perfect power out of .
Step 6.2.1.3
Factor the perfect power out of .
Step 6.2.1.4
Rearrange the fraction .
Step 6.2.1.5
Rewrite as .
Step 6.2.2
Pull terms out from under the radical.
Step 6.2.3
Combine and .
Step 6.3
Move all terms not containing to the right side of the equation.
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Step 6.3.1
Add to both sides of the equation.
Step 6.3.2
Reorder and .