Question

Factorise
(1-x^2)(1-y^2)+4xy​

Answer 1

Answer:

Answer

(1−x 2)(1−y2)+4xy1−x2−y2+x2y2+4xy

(1+2xy+x 2y2)−(y 2+x 2−2xy)(1+xy) 2−(x−y) 2 (1−y(1+xy−x+y)