Question

x² - y² – 2y - 1
Chapter:
Factorisationn​

Answer 1

Answer:

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

Step-by-step explanation:

x² - y² - 2y - 1 = x² - ( y² + 2y + 1 )

= x² - ( y² + 2×y×1 + 1² )

by using (a² +2ab +b² ) =(a+b)²

we get, = x² - ( y +1 )²

agin by using : a² - b² = (a+b)(a-b)

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