(a+b/a-b)²×(2a-2b/3a+3b)-(a²/a²-b²)÷(a/b
2(a²+b²)(a+b)²-(a²-b²)²
2(a²b+3ab²)-3(a²b-1)-2a²b-2
(a+b)/(2a+2b)乘(a²+b²)/(a²-b²) 计算
5a²-3a²+3(a²-b²)-2(5a²+2b²)怎么合
化简:(b²-a²)/(a²-2ab+b²)
已知a+b=-2,ab =-3,求a(a²-b²)-a(a²+b²)²
(a²+b²)²-4a²b²化简
已知(a+2)²+丨a+b+5丨=0,求3a²b-[2a²b-(2ab-a²b)
已知(a+2)²+丨a+b-5丨=0,求3a²b-【2a²b-(2ab-a²b)
数学因式分解计算(a²-b²)/(a²b-ab²)÷ [1+(a²+b
先化简再求值(a-b/a+b)+(a+b/a-b)-(2a²-2b²/a²+b²
若2a²+3a+b=4,求{(a+b)(a-b)+(a-b)²+4a²(a+1)}/a的值