Question

Simplify (2x+p-q)^2-(2x-p+q)^2

Answer 1

(2x+p-q)²-(2x-p+q)²
as, a²-b²=(a+b)(a-b)
(2x+p-q)²-(2x-p+q)²=(2x+p-q+2x-p+q)(2x+p-q-2x-p+q)
                               =4x

Answer 2

Use the identity a^2-b^2=(a+b)(a-b).For full answer see the photo