英语翻译Find the sum of the roots of the equation:2x^3+8x^2-7x^5+5x-4请译成中文,并讲解解题思路或过程.补充:原题确实是这样的,应该是默认为2x^3+8x^2-7x^5+5x-4=0的情况。我也觉得奇怪,不清楚题目这样

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英语翻译Find the sum of the roots of the equation:2x^3+8x^2-7x^5+5x-4请译成中文,并讲解解题思路或过程.补充:原题确实是这样的,应该是默认为2x^3+8x^2-7x^5+5x-4=0的情况。我也觉得奇怪,不清楚题目这样
英语翻译
Find the sum of the roots of the equation:2x^3+8x^2-7x^5+5x-4
请译成中文,并讲解解题思路或过程.
补充:原题确实是这样的,应该是默认为2x^3+8x^2-7x^5+5x-4=0的情况。我也觉得奇怪,不清楚题目这样的表达是不是常规方式。

英语翻译Find the sum of the roots of the equation:2x^3+8x^2-7x^5+5x-4请译成中文,并讲解解题思路或过程.补充:原题确实是这样的,应该是默认为2x^3+8x^2-7x^5+5x-4=0的情况。我也觉得奇怪,不清楚题目这样
Find the sum of the roots of the equation: 2x^3+8x^2-7x^5+5x-4
找到 和 根 等式
故原题意思是求方程2x^3+8x^2-7x^5+5x-4 = 0的根之和.
根据韦达定理,所有根之和为-8/2 = -4.也可按下列方法求出:
设方程的三个根为x1,x2,x3,则有
2(x-x1)(x-x2)(x-x3) = 0 = 2x^3+8x^2-7x^5+5x-4,
等式最左边的表达式展开后,x^2前的系数为-2(x1 + x2 + x3),应同等式最右边的表达式中对应项系数相同.可知-2(x1 + x2 + x3) = 8,从而x1 + x2 + x3 = 8/(-2) = -4.

1. Express the equation x^3+6*x^2-4*x+5=0 in reduced form and解决这个方程x ^ 3 + 2 * x ^ 2 - 5 * x-1 = 0用牛顿法。 3

求方程的根的总和:2X^ 3+8 X ^ 2-7X^ 5+5 X-4
题目不全吧,你给的这个不是方程啊

英文的意思是求方程的根。这个方程翻译下就是2乘以(X的三次方)加8乘以(X的二次方)加7乘以(X的五次方)加五乘以X,最后再减4.不过你这个式子貌似不是方程吧。方程应该最后有等号的吧。请你再仔细核对下题目好吗?希望你喜欢这个答案,如果有不明白的欢迎来问哦~~...

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英文的意思是求方程的根。这个方程翻译下就是2乘以(X的三次方)加8乘以(X的二次方)加7乘以(X的五次方)加五乘以X,最后再减4.不过你这个式子貌似不是方程吧。方程应该最后有等号的吧。请你再仔细核对下题目好吗?希望你喜欢这个答案,如果有不明白的欢迎来问哦~~

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