4a²+2ab+6a+3b
a³+a²b-(4a²b+3ab²)+b³+6ab²+2b&
(6a²-2a²)-(-a²+2ab+b²)-(a²-4ab+3b
合并同类项: -5a^b+6ab^-4ab-2a^b+4ab+3
合并同类项:-5a^b+6ab^-4ab-2a^b+4ab+3
(9a²-6ab+b²)/(3a²-ab),其中b/a=2
计算(3a-2b)(9a*a+6ab+4b*b)-(3a+2b)(9a*a-6ab+4b*b)
3a²b+ab²-2a²b²-3ab²-3a²b+4ab
因式分解:1、-4ab-4a²-b² 2、3ab²+6a²b+3a³
若a+b=3,ab=-2,求(5a-5b-ab)-(4a-6b-3ab)
2A+4+3AB+6B
已知:a-b=4,ab=3,求多项式(2a+5b-3ab)-(a+6b-ab)-(2ab+2b-2a)的值
计算:(4ab³+6a³b-8a³b²)÷2ab-(a+b)(3a-2b)