# Precalculus Examples

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

Consider the vertex form of a parabola.

Find the value of using the formula .

Multiply by .

Multiply by .

Find the value of using the formula .

Simplify each term.

Multiply by .

Raise to the power of .

Multiply by .

To write as a fraction with a common denominator, multiply by .

Write each expression with a common denominator of , by multiplying each by an appropriate factor of .

Combine.

Multiply by .

Combine the numerators over the common denominator.

Simplify the numerator.

Multiply by .

Multiply by .

Subtract from .

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

Use the vertex form, , to determine the values of , , and .

Find the vertex .