Question

Factorise-ab2 + (a - 1)b-1​

Answer 1

Answer:

(b + 1) (ab - 1)

Step-by-step explanation:

$a b^{2} +(a-1)b -1 \\= a b^{2} + ab - b - 1\\= ab (b+1) - 1(b+1)\\= (b+1)(ab-1)$

And that's our answer!

MARK BRAINLIEST