Question

Find (x+2a)^2 - (2x-a)^2 + (a-x)^2 If a=(-1) and x=(-1).
Please explain step by step.

Answer 1

Answer:

(x+2a)²-(2x-a)²+(a-x)²

{-1+2(-1)}²-{2(-1)-(-1)}²+(-1-1)²

(-1-2)²-(-2+1)²+(-2)²

(-3)²-(-1)²+(-2)²

(9)-(1)+(4)

8+4

12.