作业帮（1）2(a²-ab)-3(三分之二a²-ab)（2）5xy²-[ 3xy²-（4xy²-2x²y）]+2x²y-xy²（3）a²b-6ab-3a²b+5ab+2a²b（4）4a²-3a+3-3（-a³+2a²+1）
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/27 21:52:58
![（1）2(a²-ab)-3(三分之二a²-ab)（2）5xy²-[ 3xy²-（4xy²-2x²y）]+2x²y-xy²（3）a²b-6ab-3a²b+5ab+2a²b（4）4a²-3a+3-3（-a³+2a²+1）](/uploads/image/z/637998-6-8.jpg?t=%EF%BC%881%EF%BC%892%28a%26%23178%3B-ab%29-3%28%E4%B8%89%E5%88%86%E4%B9%8B%E4%BA%8Ca%26%23178%3B-ab%29%EF%BC%882%EF%BC%895xy%26%23178%3B-%5B+3xy%26%23178%3B-%EF%BC%884xy%26%23178%3B-2x%26%23178%3By%EF%BC%89%5D%2B2x%26%23178%3By-xy%26%23178%3B%EF%BC%883%EF%BC%89a%26%23178%3Bb-6ab-3a%26%23178%3Bb%2B5ab%2B2a%26%23178%3Bb%EF%BC%884%EF%BC%894a%26%23178%3B-3a%2B3-3%EF%BC%88-a%26%23179%3B%2B2a%26%23178%3B%2B1%EF%BC%89)
（1）2(a²-ab)-3(三分之二a²-ab)（2）5xy²-[ 3xy²-（4xy²-2x²y）]+2x²y-xy²（3）a²b-6ab-3a²b+5ab+2a²b（4）4a²-3a+3-3（-a³+2a²+1）
（1）2(a²-ab)-3(三分之二a²-ab)
（2）5xy²-[ 3xy²-（4xy²-2x²y）]+2x²y-xy²
（3）a²b-6ab-3a²b+5ab+2a²b
（4）4a²-3a+3-3（-a³+2a²+1）
（1）2(a²-ab)-3(三分之二a²-ab)（2）5xy²-[ 3xy²-（4xy²-2x²y）]+2x²y-xy²（3）a²b-6ab-3a²b+5ab+2a²b（4）4a²-3a+3-3（-a³+2a²+1）
2a²-2ab-2a²+3ab=ab
5xy²-(3xy²-4xy²+2x²y)+2x²y-xy²=5x²y-3xy²+4xy²-2x²y+2x²y-xy²=5xy²
6a²b-ab
4a²-3a+3+3a³-6a²-3=3a³-2a²-3a=a(3a²-2a-3)
ab
=2a的平方-2ab-2a的平方+3ab =ab
2a²-2ab-2a²+3ab=ab
5xy²-(3xy²-4xy²+2x²y)+2x²y-xy²=5x²y-3xy²+4xy²-2x²y+2x²y-xy²=5xy²
6a²b-ab
4a²-3a+3+3a...
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2a²-2ab-2a²+3ab=ab
5xy²-(3xy²-4xy²+2x²y)+2x²y-xy²=5x²y-3xy²+4xy²-2x²y+2x²y-xy²=5xy²
6a²b-ab
4a²-3a+3+3a³-6a²-3=3a³-2a²-3a=a(3a²-2a-3)
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（1）2a²-2ab-2a²-2ab=-4ab
（2）xy·（4y-7y+4x）
（3）-ab
（4）a（a-3）
