Question

x²-y²-2x+2y

Answer 1

x^2-y^2-2x+2y

=(x-y)(x+y)-2(x-y)

=(x-y)(x+y-2)

Answer 2

x^2-y^2-2x+2y

=(x-y)(x+y)-2(x-y)

=(x-y)(x+y-2)

Answer 3

x^2-y^2-2x+2y=  (x^2-2x)-(y^2-2y)= x(x-2)- y(y-2) = (x-y)(x-2)