The maximum or minimum of a quadratic function occurs at . If is negative, the maximum value of the function is . If is positive, the minimum value of the function is .
Find the value of equal to .
Substitute in the values of and .
Cancel the common factor of and .
Factor out of .
Cancel the common factors.
Cancel the common factor.
Rewrite the expression.
Divide by .
Multiply by .
Replace the variable with in the expression.
Simplify the result.
Raising to any positive power yields .
Subtract from .
The final answer is .
Use the and values to find where the minimum occurs.
Find the Maximum/Minimum Value f(x)=x^2-7