计算:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/739def284060b91d7e271d9d06441931.png)
_____ ;
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18b61bdd35ed75094985cd7d2d053168.png)
_____ .
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/739def284060b91d7e271d9d06441931.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18b61bdd35ed75094985cd7d2d053168.png)
更新时间:2022-11-18 14:00:10
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【推荐1】已知
,则(x-1)(3x+1)-(x+1)2的值为________ .
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【推荐2】已知
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