# Precalculus Examples

Step 1

Replace all occurrences of with a single . A plus sign followed by a minus sign has the same mathematical meaning as a single minus sign because

Step 2

Step 2.1

Factor out of .

Step 2.2

Factor out of .

Step 2.3

Factor out of .

Step 3

Step 3.1

Factor out of .

Step 3.2

Factor out of .

Step 3.3

Factor out of .

Step 3.4

Factor out of .

Step 3.5

Factor out of .

Step 4

Step 4.1

Cancel the common factor.

Step 4.2

Rewrite the expression.