作业帮2a²-b²-[(3a²-4b²)-(1/2a-b)],a=2,b=-1,计算出来···
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 08:14:21
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2a²-b²-[(3a²-4b²)-(1/2a-b)],a=2,b=-1,计算出来···
2a²-b²-[(3a²-4b²)-(1/2a-b)],a=2,b=-1,计算出来···
2a²-b²-[(3a²-4b²)-(1/2a-b)],a=2,b=-1,计算出来···
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