Question

factorise : a^2+b-ab-a

Answer 1

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

Answer 2

Answer:(a-1)(a-b)

Step-by-step explanation:

a²+b-ab-a

=a²-ab+b-a

=a(a-b)+b-a

=a(a-b)+(-b×-1)(a×-1)

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

=(a-1)(a-b)