Question

помогите плиз
5(а+3)^3-(а+3)=

Answer 1

$5(x+3) ^{3} -1(x+3)=(x+3)*(5*(x+3) ^{2} -1)=(x+3)*(5 x^{2} +\+5*9+2*5*3x-1)=(x+3)*(5 x^{2} +45+30x-1)=\=\(x+3)(5 x^{2} +44+30x)=\=\5 x^{3} +44x+30 x^{2} +15 x^{2} +132+90x= \ =5 x^{3} +45 x^{2}+ 134x+132$

Answer 2

спасибо