Algebra Examples

Find the Maximum/Minimum Value -x^2+2x-15
Step 1
The maximum of a quadratic function occurs at . If is negative, the maximum value of the function is .
occurs at
Step 2
Find the value of .
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Step 2.1
Substitute in the values of and .
Step 2.2
Remove parentheses.
Step 2.3
Simplify .
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Step 2.3.1
Cancel the common factor of .
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Step 2.3.1.1
Cancel the common factor.
Step 2.3.1.2
Rewrite the expression.
Step 2.3.1.3
Move the negative one from the denominator of .
Step 2.3.2
Multiply .
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Step 2.3.2.1
Multiply by .
Step 2.3.2.2
Multiply by .
Step 3
Evaluate .
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Step 3.1
Replace the variable with in the expression.
Step 3.2
Simplify the result.
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Step 3.2.1
Simplify each term.
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Step 3.2.1.1
One to any power is one.
Step 3.2.1.2
Multiply by .
Step 3.2.1.3
Multiply by .
Step 3.2.2
Simplify by adding and subtracting.
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Step 3.2.2.1
Add and .
Step 3.2.2.2
Subtract from .
Step 3.2.3
The final answer is .
Step 4
Use the and values to find where the maximum occurs.
Step 5