Question

(g) x - y - x2 + y2 ​

Answer 1

Answer:

$\longmapsto \: \: \: x - y - {x}^{2} + {y}^{2} \\ = (x - y) - ( {x}^{2} - {y}^{2}) \\ = (x - y) - (x - y)(x + y) \\ = \boxed{ (x - y)(1 - x - y)}$

• (x - y)(1 - x - y) is the right answer.