Question

${x }^{2} - 1 - 2y - {y}^{2}$
Factorise....
First correct answer will be marked as brainliest...!!!

Answer 1

Given Equation is x^2 - 1-  2y - y^2

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

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

We know that a^2 - b^2 = (a - b)(a + b)

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

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


Hope this helps!

Answer 2

hay

Dear friend

=> x²-y²-1-2y

=> x² - (y+1)²

=> {x-(y+1)} {x+(y+1)}

Now,

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





I hope it's help you