Question

factorise (2x+p-q)square -(2x-p+q)square

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)

Hope it helps!