Question

Resolve into factor (x+y)^3(a+b)-(x+y)(a+b)^3

Answer 1

Answer:

xn−1x−1=xn−1+xn−2+...+x+1. We can prove this via induction: Basis case : ⇒n=1 ... x3−1 is a difference of cubes ... here a=x and b=1.