题目
题型:解答题难度:一般来源:期末题
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104459-47192.gif)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104459-37481.gif)
(3)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104459-92163.gif)
(4)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104500-84516.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104500-79023.gif)
(2)原式=
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104500-17145.gif)
(3)原式=2(
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104500-49423.gif)
=2
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104500-11203.gif)
(4)原式=
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104501-95721.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104501-32393.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104454-34555.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104454-30897.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104454-28551.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104455-72343.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104455-29758.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104455-34461.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104455-23649.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104455-40801.gif)
(1)求式子中m、n的值;
(2)以上这种因式分解的方法叫试根法,用试根法分解多项式
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104456-60895.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104452-81646.gif)
下面的四个结论,回答问题。
①
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104446-27070.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104447-95918.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104447-89814.gif)
②
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104447-50175.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104447-78410.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104448-69073.gif)
③
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104448-44244.gif)
④二次三项式
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104448-15553.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104448-55094.gif)
(1)猜测:
若关于x的方程x2+px+q=0的两根为
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104448-67634.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104449-19613.gif)
(2)应用:
在实数范围内分解因式:
①
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104449-46094.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104449-75672.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819104449-19692.gif)
(1)x2(a-2)+y2(2-a);
(2)-3a3+12a2m-12am2。
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