# Precalculus Examples

,
Roots (also called zeros) are the points where the graph intercepts with the x-axis .
at the roots
The root at was found by solving for when and ( because the root is the x-intercept).
The factor is
The root at was found by solving for when and ( because the root is the x-intercept).
The factor is
Combine all the factors into a single equation.
Multiply all the factors to simplify the equation .
Expand using the FOIL Method.
Apply the distributive property.
Apply the distributive property.
Apply the distributive property.
Remove parentheses.
Simplify and combine like terms.
Simplify each term.
Multiply by by adding the exponents.
Combine and
Raise to the power of .
Raise to the power of .
Use the power rule to combine exponents.