# Precalculus Examples

,

Since the roots of an equation are the points where the solution is , set each root as a factor of the equation that equals .

Expand using the FOIL Method.

Apply the distributive property.

Apply the distributive property.

Apply the distributive property.

Simplify and combine like terms.

Simplify each term.

Multiply by .

Move to the left of .

Rewrite as .

Multiply by .

Subtract from .