# Precalculus Examples

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

Factor out of .

Reorder and .

Factor out of .

Factor out of .

Factor out of .

Factor out of .

Move .

Multiply by .

Reorder and .

Factor out of .

Factor out of .

Cancel the common factor.

Rewrite the expression.