Question

Factorise:-
x²- y²- 2y- 1​

Answer 1

Answer:

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Answer 2

Answer: (x-y-1)(x+y+1)

Step-by-step explanation:

  $x^{2} - [ y^{2} + 2y + 1]$

$= x^{2} -(y+1)^{2} \\= (x-y-1)(x+y+1)$