a²-b²/a²-3ab+2b² 怎么化简
a²-b²/a²-3ab+2b² 怎么化简
3ab+3b²/b(a²+2ab+b²) ×a²-b²/a-b ÷b/
(a+b/a-b)²×2a-2b/3a+3b÷ab/a²-b²
化简求值:3a²b-[2ab²-2(-a²b+4ab²)]-5ab²,
化简 (a²+b²/a²-b²-a-b/a+b)÷2ab/(a-b)(a+b)&
计算:(a²-b²)/(a+b)+(a²-2ab+b²)/(a-b)
3a²b+ab²-2a²b²-3ab²-3a²b+4ab
a³+a²b-(4a²b+3ab²)+b³+6ab²+2b&
化简a/a-b - b-a+b + 2ab/a²-b²
(9a²-6ab+b²)/(3a²-ab),其中b/a=2
a³-b³怎么因式分解成(b-a)(b²+a²+ab)
若实数a、b满足a分之b+b分之a=-2,求a²+3ab+b²分之a²+ab+b²