# Precalculus Examples

Cancel the common factor of .
Cancel the common factor.
Divide by .
To find the holes in the graph, look at the denominator factors that were cancelled.
To find the coordinates of the holes, set each factor that was cancelled equal to , solve, and substitute back in to .
Set equal to .
Add to both sides of the equation.
Substitute for in and simplify.
Substitute for to find the coordinate of the hole.
Simplify.
Multiply by .