Question

x2 - 1 - 2y - y^2 factorise​

Answer 1

Answer:

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Step-by-step explanation:

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x² - 1 - 2y - y²

= x² - y² - 2y - 1

= x² - ( y² + 2y + 1 )  

= x² - ( y + 1 )²

= [ x + ( y + 1 ) ] × [ x - ( y + 1 ) ]

= [ x + y + 1 ] × [ x - y - 1 ]