Question

help please guys please
factorize x-y-x²+y²​

Answer 1

Answer:

Step-by-step explanation:

x-y-x²+y²

= (x-y)-(x²-y²)

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

= (x-y) {1-(x+y)}

= (x-y) (1-x-y)