Question

factorise this question

Answer 1

taking (x+y) as common, we have


$(x + y)(1 - (x + y))$

$(x + y)(1 - x - y)$
is the answer

Answer 2

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