A(3b-1)-b(a-3)-2(ab-a+b)

Question

A(3b-1)-b(a-3)-2(ab-a+b)

Answer 1

a(3b-1)-b(a-3)-2(ab-a+b)=3ab-a-ab+3b-2ab+2a-2b=a+b

Answer 2

Раскроем скобки: a(3b-1)-b(a-3)-2(ab-a+b) =3ab-a-ab+3b-2ab+2a-2b=b+a