(a²-2ab+b²)²*²+¹÷(a-b)³×²
化简 (a²+b²/a²-b²-a-b/a+b)÷2ab/(a-b)(a+b)&
3ab+3b²/b(a²+2ab+b²) ×a²-b²/a-b ÷b/
计算 (a²-2ab+b²-a+b)÷(a-b) (a+b)²÷(a-b)
先化简再求值:a-b分之b.b³+ab²÷ab+b²分之b²-a²,a
(a+b/a-b)²×2a-2b/3a+3b÷ab/a²-b²
计算:a/b(a-b)-b/a(a-b);(1/a+1/b)÷a²+2ab+b²/a+b.
化简 b²-a²/a²-ab÷(a+(2ab+b²/a))·(1/a+1/b)
计算:(a²-b²)/(a+b)+(a²-2ab+b²)/(a-b)
a³-ab²-a+b因式分解
a³+a²b-(4a²b+3ab²)+b³+6ab²+2b&
先化简,再求值;[(2a-b/a+b)-(b/a-b)]÷{(a-2b/a+b)+[ab/(a-b)²]},其
化简a/a-b - b-a+b + 2ab/a²-b²