Question

Factorise (1 – x 2 – y 2 + 2xy)​

Answer 1

$1 - x {}^{2} - y {}^{2} - 2xy$

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

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

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

i hope it's help you

Answer 2

Answer:

hlo your Ans is in pic...