(6a²-2a²)-(-a²+2ab+b²)-(a²-4ab+3b
a³+a²b-(4a²b+3ab²)+b³+6ab²+2b&
(9a²-6ab+b²)/(3a²-ab),其中b/a=2
3a²b+ab²-2a²b²-3ab²-3a²b+4ab
(6a²-2a²)-(-a²+2ab+b²)-(a²-4ab+3b
3ab+3b²/b(a²+2ab+b²) ×a²-b²/a-b ÷b/
化简 (a²+b²/a²-b²-a-b/a+b)÷2ab/(a-b)(a+b)&
(a+b/a-b)²×2a-2b/3a+3b÷ab/a²-b²
a-(2ab-b²)/a为什么等于(a²-2ab+b²)/a 谢谢.
因式分解:1、-4ab-4a²-b² 2、3ab²+6a²b+3a³
计算:(a²-b²)/(a+b)+(a²-2ab+b²)/(a-b)
化简a/a-b - b-a+b + 2ab/a²-b²
计算:(4ab³+6a³b-8a³b²)÷2ab-(a+b)(3a-2b)