Question

(X+y) (x+y+z) -(x-y) (x-y-z)

Answer 1

Answer:

4xy

Step-by-step explanation:

(x+y)(x+y+z)-(x-y)(x-y-z)

=(x^2+xy+xz+xy+y^2+yz)-(x^2-xy-xz-xy+y^2+yz)

=(x^2+y^2+2xy-xz+yz)-(x^2+y^2-2xy-xz+yz)

=x^2+y^2+2xy-xz+yz-x^2-y^2+2xy+xz-yz

=4xy(rest all will cut due to their signs)

Please mark it as brainlist