-2(3a²-4ab)-【2a²-4(2a²-3ab)】化简
已知|a+1|+(a-b-2)²=0化简ab-[3a²b(4ab²+ab)-3a²
化简 3a²-[2ab-2(ab-3/2a²b)+ab]+4ab²
-2(3a²-4ab)-【2a²-4(2a²-3ab)】化简
(1)2(a²-ab)-4(2a²-3ab)-2[a²-(2a²-ab+b
3a²b+ab²-2a²b²-3ab²-3a²b+4ab
化简:① a²-3ab+4b²-(2b²-3ab-3a²)
(6a²-2a²)-(-a²+2ab+b²)-(a²-4ab+3b
a²-{-4ab+(ab-a²)}-2ab化简
-(3a²-4ab)+[a²-2(2a+2ab)],其中(a+2)²+|b-1|=0
计算:2/3a²-1/2ab+3/4a²+ab-b²
(1)2(a²-ab)-3(三分之二a²-ab)
化简求值:3a²b-[2ab²-2(-a²b+4ab²)]-5ab²,