Question

(a+1)(a2-a+1) and (a-1)(a2+a+1);
and then:(a+1)(a2-a+1)+(a-1)(a2+a+1).

Answer 1

Answer:

2a^3

Step-by-step explanation:

using identity (x+y)(x^2-xy+y^2)=x^3+y^3

and(x-y)(x^2+xy+y^2)