Question

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

its urgent

Answer 1

Given, x^2 - 1 - 2y - y^2

         Take x^2 common from this

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

               = x^2 - (y+1)^2

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

             

Hope this helps!