先化简,再求值:(x﹣2y)2+(x﹣2y)(2y+x)﹣2x(2x﹣y),其中x=2,y=
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
更新时间:2020-07-21 16:47:16
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解答题-计算题
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适中
(0.65)
【推荐1】先化简再求值:
(1)
,其中
.
(2)已知
,化简求值:
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b806a51f3c06d7a847c612492aa285f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a7c0dc5ac489ab1fc6f18c2d32b5f3d.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38e2a1938ce3743d2a836f5b14e06983.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4843880ee63a1219b3334ffb8c21ca.png)
您最近一年使用:0次
解答题-计算题
|
适中
(0.65)
【推荐1】(1)计算:(-1)2019+(-
)-2+(3.14-π)0
(2)化简:(a+2)(a-2)-a(a-1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(2)化简:(a+2)(a-2)-a(a-1)
您最近一年使用:0次