计算下列各题:
(1)化简:①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ebf12566311a97d1a9644ec02e1702.png)
__________ ;②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e216d7f635deac1ab358438365726dd3.png)
_________ ;③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5cfdc642d6b446f45335f29970e6706.png)
__________ ;④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd6330e6acb4506f793f2153608333ee.png)
_________ ;⑤![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d7b01a2d8fb9b62d115b2689def73c2.png)
_________ ;⑥![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecb5a094c183f10f7210f407c1e7349e.png)
_________ ;⑦![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93740f1b9124a80942a43b3d2efaacbe.png)
_________ ;⑧![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929ed4ce4e319b490231c0f20c2e1cfa.png)
_________ .
(2)分解因式:①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c749ab0b1aee57c9f489776fc89d077a.png)
_________ ;②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b7925d6f5ed2908bd18fa0715280de.png)
___________ .
(3)若代数式
有意义,则
的取值范围是_________ .
(4)一个多边形的内角和是
,这个多边形的边数是_________ .
(1)化简:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ebf12566311a97d1a9644ec02e1702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e216d7f635deac1ab358438365726dd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5cfdc642d6b446f45335f29970e6706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd6330e6acb4506f793f2153608333ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d7b01a2d8fb9b62d115b2689def73c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecb5a094c183f10f7210f407c1e7349e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93740f1b9124a80942a43b3d2efaacbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929ed4ce4e319b490231c0f20c2e1cfa.png)
(2)分解因式:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c749ab0b1aee57c9f489776fc89d077a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b7925d6f5ed2908bd18fa0715280de.png)
(3)若代数式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0800157dbd4e118d86430abcbbe95b88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(4)一个多边形的内角和是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9796c36b05391e3b829888f6b53b001f.png)
更新时间:2023-03-14 06:33:56
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填空题
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容易
(0.94)
【推荐1】在实数范围内式子
有意义,则
的范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1c951aa5610461ed424cfd9361fc700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
填空题
|
容易
(0.94)
【推荐2】我们知道:三角形的内角和为
,所以在求四边形的内角和时,我们可以将四边形分割成两个三角形,这样其内角和就是
,同理五边形的内角和是____ 度;那么n边形的内角和是___ 度;如果有一个n边形的内角和是
,那么n的值是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe639eab78eafd2d40ea70aa5d3f21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74eba15585838ae904b7cab52efb32bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27fe32ca279d8d26b349d431f73bed1e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/19/41b8576b-e2b0-49d9-b3e9-5183e2577d9a.png?resizew=423)
您最近一年使用:0次