下列多项式中,能用平方差公式分解因式的是( )
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-05-24 23:09:38
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【推荐2】下面的分式化简,对于所列的每一步运算,依据错误的是( )
计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f11d4cbf3d6b0a14b64acf384314416.png)
解:原式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d38b701967c973839b7365fee284bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deade6f0aadb2f536b92aa9ad4d31bc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85ac91b7f27263d5c1c32b96b502b9c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65d40c6ff30d749b02cabe8961f2911.png)
计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f11d4cbf3d6b0a14b64acf384314416.png)
解:原式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d38b701967c973839b7365fee284bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deade6f0aadb2f536b92aa9ad4d31bc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85ac91b7f27263d5c1c32b96b502b9c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65d40c6ff30d749b02cabe8961f2911.png)
A.①:同分母分式的加减法法则 | B.②:合并同类项法则 |
C.③:提公因式法 | D.④:等式的基本性质 |
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【推荐1】下列各式由左边到右边的变形中,因式分解正确的是( )
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】已知下列多项式:①
;②
;③
;④
.其中,能用完全平方公式进行因式分解的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32badfbd91601d87134dc7bb91837773.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0a801f1a29570e53b1276ee5869ac21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825a0f8edd681882c3b9bd6ce3958e63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed37725723d65ea7033292e8a3a23249.png)
A.②③④ | B.①③④ | C.②④ | D.①②③ |
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