## Precalculus: Mathematics for Calculus, 7th Edition

$9(x+1)(x-5)$
$Factor$ $the$ $expression$ $completely:$ $9x^2-36-45$ Factor out a 9 from all terms $9(x^2-4-5)$ Factor the trinomial in the parenthesis into binomials $9(x^2-4-5) = 9(x+1)(x-5)$