Question

please solve this...​

Answer 1

Answer:

ab^2+ ab - b -1

hope it helps you......

Answer 2

Answer:

(ab - 1)(b + 1)

Step-by-step explanation:

ab² + (a - 1)b - 1

= ab² + ab - b - 1

= ab(b + 1) - (b + 1)

= (ab - 1)(b + 1)