(1)若(x2+mx﹣8)(x2﹣3x+n)的展开式中不含x2和x3项,求2m+n的值.
(2)已知a﹣2b=
,ab=2,求:﹣a4b2+4a3b3﹣4a2b4的值.
(2)已知a﹣2b=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
更新时间:2022-09-24 10:04:28
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相似题推荐
解答题-问答题
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适中
(0.65)
【推荐1】把下面各式分解因式:
(1)8a3b2-12ab3c
(2)4m2-16n2
(3)(x2+2x)2+2(x2+2x)+1
(1)8a3b2-12ab3c
(2)4m2-16n2
(3)(x2+2x)2+2(x2+2x)+1
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解答题-问答题
|
适中
(0.65)
【推荐2】定义:如果一个数的平方等于
,记为
,这个数
叫做虚数单位,把形如
(
为实数)的数叫做复数,其中
叫这个复数的实部,
叫做这个复数的虚部,它的加、减运算与整式的加、减运算类似,复数的乘方运算与有理数的乘方运算类似,
例如:
;
;
;
根据以上信息,完成下列问题:
(1)填空:
______,
______,
______;
(2)化简:
;
(3)请你参照
这一知识,将
分解成两个复数的积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73be79c02db553929619d957187e2077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc228995efbba2e64d7f1de747024cc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ff2912fd8d93b6e692936d95b727c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
例如:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0940a1aeeb5cf20fa6a1ccd2e76fc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac910b99576e601eebb925d57281d56d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88aa7959ee013e10f228f311732cdf10.png)
根据以上信息,完成下列问题:
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d45b691a408f1d5362bd7675f5bfb257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab0f69966b801bd4339cd9c7ba2e7ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/205161d8ca06eff8abbec2c6a0d8eeb9.png)
(2)化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a89b2087a35d65e45fe1ea8dd980b185.png)
(3)请你参照
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73be79c02db553929619d957187e2077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f130dfd1d63e188c54266987efec11b.png)
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