(1)先因式分解再求值:已知
,
求
的值.
(2)化简求值
其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7dbc702617c765a573961953cc0901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b295b375d03f803f0890021e1d6b7553.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b7fae86d865d0af483eb2064b93a3fa.png)
(2)化简求值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d4e3ac11181fc457936cb9015ffe69f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fac9575a5985527e283f7295fdaf72c.png)
更新时间:2019-10-17 21:26:02
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适中
(0.65)
【推荐1】因式分解:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f764e02d6df1a8955d74db813f5b6688.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1419e2023acd01880612e7c844894b64.png)
(3)(x2+y2)2-4x2y2
(4)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f764e02d6df1a8955d74db813f5b6688.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1419e2023acd01880612e7c844894b64.png)
(3)(x2+y2)2-4x2y2
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e2df0252d3236f8e3fb91a585aea3d.png)
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【推荐2】分解因式:
(1)a2b﹣2ab2+b3.
(2)(x2+9)2﹣36x2.
(1)a2b﹣2ab2+b3.
(2)(x2+9)2﹣36x2.
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【推荐1】因式分解:
(1)4x2-16 (2)(x+y)2-10(x+y)+25
(1)4x2-16 (2)(x+y)2-10(x+y)+25
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适中
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【推荐2】因式分解:
(1)﹣20a﹣15ax;
(2)a2(x﹣y)+36(y﹣x);
(1)﹣20a﹣15ax;
(2)a2(x﹣y)+36(y﹣x);
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适中
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【推荐1】【阅读材料】
若
,求
,
的值.
解:
,
∴
,
∴
.
(1)【解决问题】已知
,求
的值;
(2)【拓展应用】已知
,
,
是
的三边长,且
,
满足
,
是
中最长的边,求
的取值范围.
若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0c37e20d3d70390bd61d20b658ab98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
解:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba5ac212fed5dda0febc283c24aa36f.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4061802506835879e26596e342771695.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e051ad5e562a166e3791d17dbcba652.png)
(1)【解决问题】已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e46c9c4bdba33edd4ab55c1c54e14a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e269e48a9be257b7760ba9d122896cc.png)
(2)【拓展应用】已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83b2df23df3af458a486f2b68c904a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐2】把下列各式因式分解:
(1)16x2-25y2;
(2)x2-4xy+4y2;
(3)(a+2b)2-(2a-b)2;
(4)(m2+4m)2+8(m2+4m)+16;
(5)81x4-y4.
(1)16x2-25y2;
(2)x2-4xy+4y2;
(3)(a+2b)2-(2a-b)2;
(4)(m2+4m)2+8(m2+4m)+16;
(5)81x4-y4.
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