Question

Factorise X2-1-2y-y2​

Answer 1

Answer:

x²-1-2y-y²

x²-(1+2y+y²)

(x)²-((y+1)²)

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

Answer 2

Answer:

$2x - 1 - 2y - y2 \\ = x2 - (1 + y)2 \\ = (x + y + 1)(x - y - 1)$

I hope it's helpful!✌️✌️✌️...