Combine and .

Use the form , to find the values of , , and .

Consider the vertex form of a parabola.

Substitute the values of and into the formula .

Multiply the numerator by the reciprocal of the denominator.

Cancel the common factor of .

Cancel the common factor.

Rewrite the expression.

Multiply .

Multiply and .

Multiply by .

Simplify each term.

Simplify the numerator.

Apply the product rule to .

Raise to the power of .

Apply the product rule to .

One to any power is one.

Raise to the power of .

Multiply by .

Multiply by .

Multiply the numerator by the reciprocal of the denominator.

Multiply .

Multiply and .

Multiply by .

Subtract from .

Substitute the values of , , and into the vertex form .

Complete the Square x^2-1/6x