Question

factorise 1 -(x-y) square please help​

Answer 1

Answer:

Step-by-step explanation:

$1-(x-y)^2\\\\=1^2-(x-y)^2\\\\=(1-(x-y))(1+(x-y))\\\\=(1-x+y)(1+x-y)\\\\\\\\\\FORMULAE\\\\a^2-b^2 = (a-b)(a+b)$

HOPE IT HELPS