Question

simplify- (x+y)(x+y+z) - (x-y)(x-y-z)​

Answer 1

Answer:

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

[ x² +xy + xz +xy +y² +xy ] - [ x² -xy-xz-xy+y²+xy ]

x²+2xy+y²+xz-x²+2xy+xz-y²

4xy+2xz

2(2xy + xz)