Question

7年级整式题！要快！过程！

5a^2 b-3ab-4ab^2+7ab-2ab^2

Answer 1

5a^2 b-3ab-4ab^2+7ab-2ab^2
=5a^2 b+(7ab-3ab)+(-4ab^2-2ab^2)
=5a²b+4ab-5ab²
=ab(5a+4-5b)

Answer 2

原式=5a²b+(-3ab+7ab)-(4ab²+2ab²)
=5a²b+4ab-6ab²