已知多项式
分解因式后能够变成两个含有
的一次因式的乘积,则实数
的值为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd9fdfa38ebdd8e4d12b0b42f5144521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663a61ad241d5d874c9a9362f0ee917c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
更新时间:2024-02-11 21:34:44
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【推荐1】如图,在
ABC中,CD是AB边上的中线,设BC=a,AC=b,若a,b满足a2﹣10a+b2﹣18b+106=0,则CD的取值范围是 _____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://img.xkw.com/dksih/QBM/2022/1/19/2897592587558912/2915587108249600/STEM/2c5f94fe-5417-41a8-a3c1-f5c2bd95e284.png?resizew=205)
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真题
【推荐2】若x+y=10,xy=1 ,则
=_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1250e8600e329e4525713484ca3b1dc.png)
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【推荐1】已知关于
的方程组![](https://staticzujuan.xkw.com/quesimg/Upload/formula/343b5a5ce9ae4dd86fac7978b965609b.png)
(1)若方程组的解满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
______ .
(2)若方程组的解中
恰为整数,
也为整数,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/343b5a5ce9ae4dd86fac7978b965609b.png)
(1)若方程组的解满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f1a686b80b8f109a929f58c2de7201d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
(2)若方程组的解中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
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【推荐2】对
,
定义一种新运算E,规定E(x,y)=ax+2by(其中
,
是非零常数),这里等式右边是通常的四则运算.如:E(3,-1)=3a-2b.
(1)E(m,2)=_________ ;(用含m,
,
的代数式表示)
(2)若E(1,1)=E(3,-1)=4.则a=________ ,b=________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(1)E(m,2)=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若E(1,1)=E(3,-1)=4.则a=
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