Question

ab²- (a-1) b-1

factorise​

Answer 1

ab^2-ab+b-1

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

(ab+1)(b-1)

either ab+1=0

ab=-1

or b-1=0

b=1

a=-1

Answer 2

Step-by-step explanation:

Ok so here's your answer