Question

z^2-x^2-2x-1 factorise​

Answer 1

Step-by-step explanation:

IN THIS SUM WE WILL USE THE FORMULA

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

FIRST WE WILL FACTORISE x^2-2x-1

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

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

USING THE FORMULA OF a^2-b^2

= (z+x+1)(z-x-1)