Question

Номер 413 2помогите пж

Answer 1

(a+1)(a^2+5a+6)=(a^2+3a+2)(a+3)
a^3+5a^2+6a+a^2+5a+6=a^3+3a^2+2a+3a^2+9a+6
5a^2+a^2-6a^2=0
a^2(5+1-6)=0
a=0