# Precalculus Examples

Step 1

Step 1.1

Cancel the common factor.

Step 1.2

Divide by .

Step 2

To find the holes in the graph, look at the denominator factors that were cancelled.

Step 3

Step 3.1

Set equal to .

Step 3.2

Add to both sides of the equation.

Step 3.3

Substitute for in and simplify.

Step 3.3.1

Substitute for to find the coordinate of the hole.

Step 3.3.2

Simplify.

Step 3.3.2.1

Multiply by .

Step 3.3.2.2

Add and .

Step 3.4

The holes in the graph are the points where any of the cancelled factors are equal to .

Step 4