3a²b+ab²-2a²b²-3ab²-3a²b+4ab²
问题描述:
3a²b+ab²-2a²b²-3ab²-3a²b+4ab²
答
3a²b+ab²-2a²b²-3ab²-3a²b+4ab²
=(3-3)a^2b+(1-3+4)ab^2-2a^2b^2
=2ab^2-2a^2b^2
=2ab^2(1-a)