Answer:
X²/Z²
Step-by-step explanation:
((Xy+xz)/(xz-z²) )*((xy-yz)/(xz+yz))/((y²+yz)/(x²+xy))
= ((Xy+xz)/(xz-z²) )*(y/z(x-z)/(x+y) * x/y(x+y)/(y+z)
= ((Xy+xz)/(xz-z²) )*(x/z(x-z)/(y+z))
= (X/z(y+z)/(x-z)) * (x/z(x-z)/(y+z))
= X²/Z²
