Question

$1 - (x - y) {}^{2} factorise$
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Answer 1

Answer:

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Answer 2

1 - (x-y)^2

= 1^2 - (x-y)^2

a^2 - b^2 = (a+b) (a-b) --indentity

= (1+x-y) [1-(x-y)]

= (1+x-y) (1-x+y)

I hope this will help you mate