先化简,再求值:
,其中
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecb990bb1d858ab6f98369e1cc31bffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb70fdf064b9193e506ca43f4672af56.png)
更新时间:2021-08-08 12:27:53
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相似题推荐
解答题-计算题
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较易
(0.85)
【推荐1】化简与求值:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/453f7c1f504497fdf2524585ea8be121.png)
(2)先化简:
,再从-1、0、1中选一个合适的x的值代入求值.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/453f7c1f504497fdf2524585ea8be121.png)
(2)先化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee53be04f75e878f9f46fe3484d0b7b.png)
您最近一年使用:0次
解答题-计算题
|
较易
(0.85)
【推荐2】先化简再求值:
(1)(3x-y)2-(y+3x)(y-3x),其中x=
,y=-1.
(2)
,其中
,
.
(1)(3x-y)2-(y+3x)(y-3x),其中x=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc7a79a2433368507027b4d5f0111af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f3fa679bb55ded25a9b72a8e788cb1.png)
您最近一年使用:0次