先化简,再求值:
,其中
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe37ac65ae2bb40912f620a4c94a4136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107babba45f110012183dc4dc54490f7.png)
22-23七年级下·陕西西安·阶段练习 查看更多[2]
更新时间:2023-03-27 19:12:31
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【推荐2】解下列各题:
(1)计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97afd2ce23e0f85ed3996ca93b540a31.png)
(2)用乘法公式计算:
(用乘法公式).
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97afd2ce23e0f85ed3996ca93b540a31.png)
(2)用乘法公式计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0e15d5344686caaeb57b42b7acb65f.png)
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