Respuesta :

howardabbie998

Answer:

x²+xy+yx-y²

Step-by-step explanation:

(x+y)(x-y)

x times x =x²

x times y= xy

y times x=yx

y times y=y²

mirtww

Step-by-step explanation:

It's x*x+x*y-x*y-y*y => x^2 +xy - xy- y^2 = x^2-y^2