Question

factorize x²-1-2a-a²

Answer 1

• x² - 1 - 2a - a²

   = x² - ( 1 + 2a + a² )       [(a+b)² = a² + b² + 2ab ]

  = x² - ( 1 + a )²              [ a² - b² = ( a+b)(a-b)

 = (x + 1 + a ) (x - 1 - a)

Thank u.

Answer 2

x^2-(1+2a+a^2)

=x^2-[ (1)^2+2×1×a+(a)^2]

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

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