x²-1-2y-y² factorise
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x^2-y^2-2y-1
=x^2-(y^2+2y+1)
=x^2-(y^2+1y+1y+1)
=x^2-[y(y+1)+1(y+1)]
=x^2-(y+1)(y+1)
let y+1=a
so, x^2-a^2
=(x+a)(x-a)
putting value of a
=(x+y+1)(x-y-1)
hope it is useful for you
please give me a brainlist
=x^2-(y^2+2y+1)
=x^2-(y^2+1y+1y+1)
=x^2-[y(y+1)+1(y+1)]
=x^2-(y+1)(y+1)
let y+1=a
so, x^2-a^2
=(x+a)(x-a)
putting value of a
=(x+y+1)(x-y-1)
hope it is useful for you
please give me a brainlist
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