1)x+xy+a+ay2)kt+t-2k-23)am+an+4m+4n4)4+2m+2n+mn5)ab+ac+7b+7c6)xz+yz-3x-3y

Question

1)x+xy+a+ay2)kt+t-2k-23)am+an+4m+4n4)4+2m+2n+mn5)ab+ac+7b+7c6)xz+yz-3x-3y

Answer 1

1. =х*(1+у)+а*(1+у)=(1+у)*(х+а)
2. =t*(k+1)-2(k+1)=(k+1)*(t-2)