因式分解:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e6e770680678bd9d149efa16dc2086.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da01df191a967c196973cb60d6ecef63.png)
23-24七年级下·广西贵港·期中 查看更多[4]
广西壮族自治区贵港市覃塘区2023-2024学年七年级下学期期中数学试题(已下线)江苏省七年级数学下学期期末模拟试卷02-2023-2024学年七年级数学下学期考试满分全攻略高频考点+重难点讲练与测试(苏科版)(已下线)专题10 80道计算题训练2(8大题型)-备战2023-2024学年八年级数学下学期期末真题分类汇编(北师大版)(已下线)暑假作业05 多项式的因式分解(知识梳理+7大题型+拓展突破)-【暑假分层作业】2024年七年级数学暑假培优练(苏科版)
更新时间:2024-06-20 22:29:27
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【推荐1】将下列各式分解因式
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1d7ccff08ba71c9613cf9cf1a591c73.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d109e983e98efa75b834485722e93a53.png)
(3)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30c8794a552d9c5ab0569af25d1cb365.png)
(4)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1d7ccff08ba71c9613cf9cf1a591c73.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d109e983e98efa75b834485722e93a53.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30c8794a552d9c5ab0569af25d1cb365.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe4c9b940cd97c345bf7985c7f5e75ef.png)
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【推荐1】(1)若
,
,
是三角形的三边长,且满足关系式
,试判断这个三角形的形状.
(2)若
,
,
是
的三边长,且满足
,则
是什么形状?
![](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/7926843b69278fa17d75a415dfe01869.png)
(2)若
![](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/a7ac716cb36e7e7fcfa77a1651e508d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】求解:
(1)解不等式,并把其解集表示在下面的数轴上
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb6654af7b22842d3a6e76eaae6cdc4f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/30/5780245e-8e88-4290-88dd-28d6ece4d6f5.png?resizew=227)
(2)分解因式:
.
(1)解不等式,并把其解集表示在下面的数轴上
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb6654af7b22842d3a6e76eaae6cdc4f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/30/5780245e-8e88-4290-88dd-28d6ece4d6f5.png?resizew=227)
(2)分解因式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11763c66ae3802bfc8cdcd0b57b5259e.png)
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【推荐3】配方法是将一个式子的某一部分通过恒等变形转化为完全平方式的形式.此法常被用到代数式的变形中,并结合非负数的意义来解决一些问题.
我们定义:一个整数能表示成
(a、b是整数)的形式,则称这个数为“完美数”.例如,5是“完美数”,理由:因为
,所以5是“完美数”.
解决问题:(1)①29是“完美数”,请将它写成
(a、b是整数)的形式___________;
②若
可配方成
(m、n为常数),则
___________;
探究问题:(2)①已知
,则
___________;
②已知
(x、y是整数,k是常数),要使S为“完美数”,试写出符合条件的一个k值___________
拓展结论:(3)已知实数x、y满足
,求
的最值,并求出此时x的值.
我们定义:一个整数能表示成
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925be255ca736a53b24d13ddede1a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa0f7368432b977563895c2d28862766.png)
解决问题:(1)①29是“完美数”,请将它写成
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925be255ca736a53b24d13ddede1a86.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/178d0ab9417a5f9ad9d2cd324612d642.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/855c1b3733e046c292c4e166954ef216.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/549f99e6e10e61af2e7734c4d01ea90c.png)
探究问题:(2)①已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af860678725c6ea1c72d33416d436fde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edff1881635893293dd411ead8194aca.png)
②已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65bec55c3826d2d5adee734c2ce790c.png)
拓展结论:(3)已知实数x、y满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcade0ecb508f1837209cdd4c75fc12a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61e3da18d31497e7c2ce5217d139f80e.png)
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