Question

factorise .. x^2-1-2a-a^2

Answer 1

Hola there,

=> x² - 1 - 2a - a²

=> x² - (a² + 2a + 1)

=> x² - (a + 1)²

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

=> (x - a - 1)(x + a + 1). ...Ans

Hope this helps....:)

Answer 2

Hi ,

x² - 1 - 2a - a²

= x² - ( 1 + 2a + a² )

= x² - ( 1² + 2 × 1 × a + a² )

= x² - ( 1 + a )²

= ( x + 1 + a ) [ x - ( 1 + a ) ]

= ( x + a + 1 ) ( x - a - 1 )

I hope this helps you.

: )