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

(5r+2)($4r^{2}$+3)
$20r^{3}$+$8r^{2}$+15r+6.Factor out: You have four terms so group the first two and last two terms: ($20r^{3}$+$8r^{2}$)+(15r+6.) The GCF for the first group is $4r^{2}$ and for the second group is 3: $4r^{2}$(5r+2)+3(5r+2) You have 5r+2 in common so group it by itself: (5r+2)($4r^{2}$+3)