Question

Can someone please solve question number 1 part 2

Answer 1

solution:

(a+1)(a-1)(a^2+1)

using identity:

(a+b)(a-b)=a^2-b^2

(a^2-1^2)=(a+1)(a-1)

so,

(a+1)(a-1)(a^2+1)

=(a^2-1)(a^2+1)

=(a^4-1) Answer!