解下列各题:
(1)计算:
;
(2)
;
(3)化简:
;
(4)下面是小丽化简的过程,仔细阅读后解答所提出的问题.
解:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0080335a373856a5f46718b4b563d45.png)
第一步
第二步
. 第三步
①小丽的化简过程从第_______步开始出现错误,出现错误的原因是_______;
②请对原整式进行化简,并求当
时原整式的值.
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c0fcd57888c273ae89ae69a3246aa74.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33239223fce7a6091d6b14c253087c1f.png)
(3)化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e351914cde1cbad3696095aab5540694.png)
(4)下面是小丽化简的过程,仔细阅读后解答所提出的问题.
解:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0080335a373856a5f46718b4b563d45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451180eb825021e14086f93fd0a2a253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac13068a86b158914a40512c2d0ea3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c8ab650235caff5f10e87d833722355.png)
①小丽的化简过程从第_______步开始出现错误,出现错误的原因是_______;
②请对原整式进行化简,并求当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bfdf2adf6e924a896b809f414d6e87e.png)
更新时间:2021-09-06 12:28:57
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【推荐1】我们规定:若实数a与b的平方差等于80,则称实数对
在平面直角坐标系中对应的点为“双曲点”;若实数a与b的平方差等于0,则称实数对
在平面直角坐标系中对应的点为“十字点”.
(1)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bec550c01b4f075f22ab67f5e55ed5d.png)
(2)在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331ed827ebff6587e06eb407486894d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d31de989768614bc10f68c2c47175e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e9c2df5439258e014d1455f0ba2380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d73443dc47fa8fb6ffa269900568630.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc8bbf130181e68432410a0269a0b130.png)
(4)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f109ad046f362d8686c7ef9810c568.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efa2e58bf580ae952c2fe5abd35c23de.png)
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