若
,
,则2A-B的结果为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07d04b61be13f4b191c40970778290c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b85378d2e81db01089fa0058f13d947.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2017-12-21 18:25:25
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【知识点】 整式的加减及运用
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单选题
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较易
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【推荐1】如图1,将一个边长为a的正方形纸片剪去两个小矩形,得到一个“
”的图案,如图2所示,再将剪下的两个小矩形拼成一个新的矩形,如图3所示,则新矩形的周长可表示为( )
![](https://img.xkw.com/dksih/QBM/2022/11/11/3107211085037568/3160294798893056/STEM/590392796fd24ea29bdf350e1d4d1efd.png?resizew=486)
![](https://img.xkw.com/dksih/QBM/2022/11/11/3107211085037568/3160294798893056/STEM/2376771587494df28dd445632054b555.png?resizew=15)
![](https://img.xkw.com/dksih/QBM/2022/11/11/3107211085037568/3160294798893056/STEM/590392796fd24ea29bdf350e1d4d1efd.png?resizew=486)
A.![]() | B.![]() | C.![]() | D.![]() |
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单选题
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较易
(0.85)
【推荐2】设
,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b86155654a98c3dfe454ddae9cecda5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/086b986ce7eba924be3e9ec773aa33d6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次