=12a2b−8a+5a2b−2ab+−1(4ab2−6ab+2a+3ab)=12a2b+−8a+5a2b+−2ab+−1(4ab2)+−1(−6ab)+−1(2a)+−1(3ab)=12a2b+−8a+5a2b+−2ab+−4ab2+6ab+−2a+−3abCombine Like Terms:=12a2b+−8a+5a2b+−2ab+−4ab2+6ab+−2a+−3ab=(12a2b+5a2b)+(−4ab2)+(−2ab+6ab+−3ab)+(−8a+−2a)=17a2b+−4ab2+ab+−10aAnswer:=17a2b−4ab2+ab−10a
