(1)计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/754a2aeee4a13cdfaccd4660fa3ccbdb.png)
(2)先化简,再求值:
,其中
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/754a2aeee4a13cdfaccd4660fa3ccbdb.png)
(2)先化简,再求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/953ded2fff500cd870d5856806147f59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b86304c3e26200299a0480641525a283.png)
更新时间:2021-08-16 07:13:28
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【推荐1】化简:3(2x2﹣y2)﹣2(3y2﹣2x2).
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