Question

a2-b2-2b-1 factoris this question​

Answer 1

Answer:

(a+b+1)(a-b-1)

Step-by-step explanation:

a2-b2-2b-1

= a2 - ( b2+2b+1) { we take minus as the common part}

= a2 - ( 1+b)^2 { we know (a+b)^2=a2+2ab+b2}

= (a+b+1)(a-b-1) {we use the formula of a2- b2.