作业帮1/2a²-[1/2（ab-a²)+4ab]-1/2ab 怎么解
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/20 11:29:36
![1/2a²-[1/2（ab-a²)+4ab]-1/2ab 怎么解](/uploads/image/z/2591973-45-3.jpg?t=1%2F2a%26%23178%3B-%5B1%2F2%EF%BC%88ab-a%26%23178%3B%29%2B4ab%5D-1%2F2ab+%E6%80%8E%E4%B9%88%E8%A7%A3)
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1/2a²-[1/2（ab-a²)+4ab]-1/2ab 怎么解
1/2a²-[1/2（ab-a²)+4ab]-1/2ab 怎么解
1/2a²-[1/2（ab-a²)+4ab]-1/2ab 怎么解
原式=1/2a²-(1/2ab-1/2a²+4ab)-1/2ab
=1/2a²-1/2ab+1/2a²-4ab-1/2ab
=a²-5ab