Question

x²-1-2y-y² factorise the problem
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Answer 1

Step-by-step explanation:

X2-1-2y-y2

Formula( 1+y)2=1+2y+y2

=X2-(1+2y+y2)

=X2-(1+y)2

a2-b2=(a+b)(a-b)

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