Question

a²-b²-2b+1
factorisation​

Answer 1

Step-by-step explanation:

= a2 – b2 - 2b – 1

= a2 – (b2 + 2b + 1)

{( a+ b) =a^2+b^2+2ab}

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

= (a)2 – ( b + 1)2

= (a + b + 1) (a – b – 1)