化简
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f8467ec57666aa96d7052c0f3fb0b47.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f8467ec57666aa96d7052c0f3fb0b47.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4da414a6088d9443349faf15756dc0c.png)
更新时间:2020-12-25 10:15:42
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解答题-问答题
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较易
(0.85)
【推荐2】水库中的水位第一天连续上升了
小时,平均每小时上升
,第二天连续下降了
小时,平均每小时下降
,第三天连续下降了
小时,平均每小时下降
,这三天水位总的变化情况如何?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78d0ab561d0c9bb9099772c596af8bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/372511352a46b7f90aeadf6ea478f6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0794c29dd67ce995cb4ac622fb0555c.png)
您最近一年使用:0次
解答题-问答题
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较易
(0.85)
【推荐1】合并同类项
(1)9xy+4x2-3(xy-
y2)-1
(2)4ab-3b2-[(a2+b2)-(a2-b2)]
(1)9xy+4x2-3(xy-
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc6803a16a1473975b49cddd32d2a654.png)
(2)4ab-3b2-[(a2+b2)-(a2-b2)]
您最近一年使用:0次