利用乘法公式计算:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f548516085b82db351f2707fb011aafc.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddddba4742c631e42bf3baefe7d149d3.png)
23-24六年级下·山东淄博·期中 查看更多[2]
山东省淄博市高青县第三中学2023-2024学年六年级下学期期中模拟考试数学试题(已下线)专题08 乘法公式与因式分解(考点清单+16种题型解读)-2023-2024学年七年级数学下学期期中考点大串讲(苏科版)
更新时间:2024-04-22 12:54:14
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解答题-问答题
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(0.85)
【推荐1】探究规律并解决问题.
(1)比较
与
的大小
用“
”“
”或“
”填空
:
①当
,
时,
______
;
②当
,
时,
______
;
③当
,
时,
______
.
(2)通过上面的填空,猜想
与
的大小关系,并说明理由.
(1)比较
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925be255ca736a53b24d13ddede1a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a025f648f3051e60bb8924dc0bfb313f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392cdb9d30684cce244bef94b8d861b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcdb7a488910743dc5c63afb394b87e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925be255ca736a53b24d13ddede1a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a025f648f3051e60bb8924dc0bfb313f.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc64eaf4cd6737b000b28f1fcdd16c4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925be255ca736a53b24d13ddede1a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a025f648f3051e60bb8924dc0bfb313f.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22a4a0dd7307a1323d25331e60782d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcdb7a488910743dc5c63afb394b87e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925be255ca736a53b24d13ddede1a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a025f648f3051e60bb8924dc0bfb313f.png)
(2)通过上面的填空,猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925be255ca736a53b24d13ddede1a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a025f648f3051e60bb8924dc0bfb313f.png)
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解答题-计算题
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【推荐2】按要求解下列各题:
(1)先化简,再求值:(x﹣2y)2﹣3(x+y)(x﹣y)+2x2,其中,x=1,y=﹣1.
(2)解方程:( x+3)(x﹣3)﹣(x+5)(x﹣1)=2
(1)先化简,再求值:(x﹣2y)2﹣3(x+y)(x﹣y)+2x2,其中,x=1,y=﹣1.
(2)解方程:( x+3)(x﹣3)﹣(x+5)(x﹣1)=2
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