Question

factorise : ab² + ( a - 1 )b - 1​

Answer 1

Answer:

ab

2

+(a−1)b−1

=ab

2

+ab−b−1

=ab(b+1)−1(b+1)

=(b+1)(ab−1)

Step-by-step explanation:

please marked me as brainlist

Answer 2

Answer:

(ab - 1)(b + 1)

Step-by-step explanation:

ab²+(a-1)b-1

= ab² + ab - b -1

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

= (ab-1)(b+1)