Question

factorise 9-2xy-(x^2+y^2)​

Answer 1

Answer:

(3-x-y) *(3+x+y)

Step-by-step explanation:

Expand: 9-2xy-x^2-y^2

Factorize: 9- (x^2+2xy+y^2

Factorize: 9-(x+y)^2

Factorize: (3-(x+y)) *(3+(x+y))

Factorize: (3-x-y) *(3+x+y)