如图所示的框图表示解方程
的流程,其中A代表的步骤是_________ ,步骤A对方程进行变形的依据是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c076fb0b3551b8f9a9210aa8b2d37ab8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/3/bdb34117-1352-43fb-99dc-b0f1b30aae49.jpg?resizew=164)
更新时间:2023-09-24 05:56:18
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【推荐1】已知抛物线
与x轴交点的横坐标为
,则
=________ .
![](https://img.xkw.com/dksih/QBM/2014/10/20/1573752773156864/1573752779276288/STEM/71760108752a49b183953cc41b35ab39.png?resizew=92)
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![](https://img.xkw.com/dksih/QBM/2014/10/20/1573752773156864/1573752779276288/STEM/99bf39a624454a84ab04e283371a099b.png?resizew=34)
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【推荐2】已知方程
,用含
表示
的式子是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070d1ea22a92808dad7489438c239629.png)
________ ,用含
表示
的式子是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afc5b4b51b74721f0c9392b84a20a6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070d1ea22a92808dad7489438c239629.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
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