Question

Solve(x+y)(x+y+z)-(x-y)(x-y-z)​

Answer 1

Step-by-step explanation:

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

= x(x+y+z)+y(x+y+z)-[x(x-y-z)-y(x-y-z)]

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

=xy+xy+xz+xz

= 2xy+2xz

= 2(xy+xz)