Question

Factorise (c+d)^2-(a-b)^2

Answer 1

(c+d)²-(a+b)²
=(c+d+a+b)(c+d-a-b)

Answer 2

Its identity match from a² -b²=(a+b)(a-b)
So
(C+d+a-b)(c+d-a-b)






I hope this will help you
By DEVANSH