Question

x-y-x^2+y^2 solve it​

Answer 1

Answer:

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