Asked by shrestha tejaswi
factorise:x^2-1-2y-y^2
Answers
Answered by
asfa
x^2-1-2y-y^2
=x^2-y^2-2y-1
=x^2-(y^2+2y+1)
=x^2-(y+1)^2
=(x+y+1)(x-y+1)
=x^2-y^2-2y-1
=x^2-(y^2+2y+1)
=x^2-(y+1)^2
=(x+y+1)(x-y+1)
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