Question

1. X^2 – y^2 – 2y - 1

Answer 1

x^2 - y^2 - 2y - 1

x^2 - (y^2 + 2y + 1)
x^2 - (y+1)^2
(x - (y+1)) (x + (y+1))
(x - y - 1)(x + y + 1)

Hope this helps :3