Question

Помогите с 8 не помню

Answer 1

$x^{a} * x^{b} =x^{a+b} \\ 8) a^{5} *a ^{7} = a^{5+7}=a ^{12} \\ c ^{3} * c^{4} =c ^{3+4} =c ^{7} \\ r ^{2} *r ^{9} =r ^{2+9}=r ^{11} \\ p ^{6} *p x^{3} =p ^{6+3} =p ^{9}$