计算:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d05dee357def6c1ec48dfb35a8f9de9.png)
更新时间:2024-01-18 17:03:29
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【推荐2】计算:(1)﹣20+(﹣3)²+(+0.2)5×(+5)6﹣|﹣13|;
(2)先化简,再求值:(2x+3y)²﹣(2x+y)(2x﹣y)+1,其中
,
.
(2)先化简,再求值:(2x+3y)²﹣(2x+y)(2x﹣y)+1,其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fac9575a5985527e283f7295fdaf72c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f3fa679bb55ded25a9b72a8e788cb1.png)
您最近一年使用:0次
解答题-计算题
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较易
(0.85)
【推荐1】计算:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02d7d7c6c83bee2b6f23cc468173c7c.png)
(2)求满足条件的锐角α:2cosα
=0
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02d7d7c6c83bee2b6f23cc468173c7c.png)
(2)求满足条件的锐角α:2cosα
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9db9373e74ecf5d63ad98afe66aa4ba.png)
您最近一年使用:0次