下列方程是一元二次方程的是( )
A.![]() | B.![]() |
C.![]() | D.![]() |
更新时间:2021-03-25 13:52:25
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【推荐1】下列方程中,一元二次方程共有( ).
①
②
③
④
⑤![](https://img.xkw.com/dksih/QBM/2013/12/24/1573691902115840/1573691950030848/STEM/6a51142ce0934afaa75188a55e0e02db.png)
①
![](https://img.xkw.com/dksih/QBM/2013/12/24/1573691902115840/1573691950030848/STEM/2fa11fb615514fbfbbb788d701ee91b7.png)
![](https://img.xkw.com/dksih/QBM/2013/12/24/1573691902115840/1573691950030848/STEM/8362db35d072471ba49d5c8259eb37aa.png)
![](https://img.xkw.com/dksih/QBM/2013/12/24/1573691902115840/1573691950030848/STEM/6a05aff2dc724199947550c90aad4e53.png)
![](https://img.xkw.com/dksih/QBM/2013/12/24/1573691902115840/1573691950030848/STEM/0dc1fcbcd4fa475c9acaa0bfcfe424a8.png)
![](https://img.xkw.com/dksih/QBM/2013/12/24/1573691902115840/1573691950030848/STEM/6a51142ce0934afaa75188a55e0e02db.png)
A.2个 | B.3个 | C.4个 | D.5个 |
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较易
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【推荐2】下列方程中,是关于
的一元二次方程的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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