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

$3h(h^{2}+2)(2h+3)$
$6h^{4}+9h^{3}+12h^{2}+18h=$ ...factor out the GCF. $=3h(2h^{3}+3h^{2}+4h+6)$ ...factor by grouping. ...(factor out the GCF of each group of two terms) $=3h[h^{2}(2h+3)+2(2h+3)]$ ...factor again ...(factor out the common factor, $(2h+3)$) $=3h(h^{2}+2)(2h+3)$