kobeitkiwke jikteniz : a²b-a-ab²+b-2ab+2

Question

kobeitkiwke jikteniz : a²b-a-ab²+b-2ab+2

Answer 1

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

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