Question

factorise it

x² - y²– 2y - 1​

Answer 1

Step-by-step explanation:

x²-y²-2y-1

Group:

x²-(y²+2y+1)

Factor what's in parentheses:

x²-(y+1)²

Now you have the difference of squares, so use the rule for factoring the difference of squares:

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

Simplify:

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

Answer 2

Step-by-step explanation:

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