Question

Factorise the following polynomials by
grouping
d) ab - ab - a²b + a²​

Answer 1

here is your answer bro bye

Answer 2

Answer:

your question is little bit of wrong here just see

ab^2 - ab - a²b + a²

=ab (b-1)-a^2(b-1)

=(b-1)(ab-a^2)

=a(b-1)(b-a)