## Algebra 1: Common Core (15th Edition)

$3(3w+2)(3w-2)$
$27w^{2}-12=$ ...factor out the GCF, $3$. $=3(9w^{2}-4)$ ...write the difference as $a^{2}-b^{2}$. $=3((3w)^{2}-2^{2})$ ...factor using the rule for a difference of two squares. $=3(3w+2)(3w-2)$