(3a²-ab+7)-(-4a²+2ab+7)=?
答案:3 悬赏:20
解决时间 2021-01-25 12:46
- 提问者网友:难遇难求
- 2021-01-25 07:38
(3a²-ab+7)-(-4a²+2ab+7)=?
最佳答案
- 二级知识专家网友:未来江山和你
- 2021-01-25 08:47
(3a²-ab+7)-(-4a²+2ab+7)
=3a²-ab+7+4a²-2ab-7
=3a²+4a²-ab-2ab-7+7
=7a²-3ab
=3a²-ab+7+4a²-2ab-7
=3a²+4a²-ab-2ab-7+7
=7a²-3ab
全部回答
- 1楼网友:長槍戰八方
- 2021-01-25 09:41
3a²-ab+7)-(-4a²+2ab+7)
=3a^2-ab+7+4a^2-2ab-7
=7a^2-3ab
=a(7a-3b)
=3a^2-ab+7+4a^2-2ab-7
=7a^2-3ab
=a(7a-3b)
- 2楼网友:躲不过心动
- 2021-01-25 09:19
(3a²-ab+7)-(-4a²+2ab+7)
=3a²-ab+7+4a²-2ab-7
=(3+4)a²+(-1-2)ab+(7-7)
=7a²-3ab
=a(7a-3b)
=3a²-ab+7+4a²-2ab-7
=(3+4)a²+(-1-2)ab+(7-7)
=7a²-3ab
=a(7a-3b)
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