Question

x^2-y^2-2y-1 please factorise this. ASAP

Answer 1

Taking minus common

x*2-(y*2+2y+1)=0

Now y*2+2y+1 is inform of(a+b)*2=a*2+b*2+2ab

So taking it in identity form

x*2-(y+1)*2=0

It is in form of indentitiy that is

a*2-b*2=a+b(a-b)

Here a=a*2 and b= (y+1)*2

There for

(x+y+1)(x-y-1)=0

So x= -y-1 or x= y+1

Answer 2

this is the answer( a+b )(a-b)
(x-y+1)(x-y-1)