Question

( frac{x^{2}-x y+y^{2}+2 y times(x-y)-x y}{(x-y) times(x+y)} )
( frac{x^{2}-x y+y^{2}+2 x y-2 y^{2}-x y}{(x-y) times(x+y)} )
( frac{x^{2}+0-y^{2}}{(x-y) times(x+y)} )
( frac{x^{2}-y^{2}}{(x-y) times(x+y)} )
( frac{(x-y) times(x+y)}{(x-y) times(x+y)} )

# x + 3 2y X + y х+ y x

Solution