已知
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad81135f35c15d1ab755fbe275356b5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea873dd83b01dcdd9071a19d8899fce5.png)
更新时间:2021-01-07 13:26:00
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解答题-问答题
|
较易
(0.85)
【推荐1】已知x=2+
,求代数式(7﹣4
)x2+(2﹣
)x﹣
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
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