帮我解个 高次方程

来源：百度知道 编辑：UC知道 时间：2024/06/20 02:49:04
谁有 matlab 之类的 工具
Ax^3 + Bx^2 + Cx + D =0
A=-1380
B=124200
C=440454000
D=538000 00000

X=？？

x =5/69*(63881326908+276*i*58406910454881111^(1/2))^(1/3)+1480600/(63881326908+276*i*58406910454881111^(1/2))^(1/3)+30
-5/138*(63881326908+276*i*58406910454881111^(1/2))^(1/3)-740300/(63881326908+276*i*58406910454881111^(1/2))^(1/3)+30+5*i*3^(1/2)*(1/138*(63881326908+276*i*58406910454881111^(1/2))^(1/3)-148060/(63881326908+276*i*58406910454881111^(1/2))^(1/3))
-5/138*(63881326908+276*i*58406910454881111^(1/2))^(1/3)-740300/(63881326908+276*i*58406910454881111^(1/2))^(1/3)+30-5*i*3^(1/2)*(1/138*(63881326908+276*i*58406910454881111^(1/2))^(1/3)-148060/(63881326908+276*i*58406910454881111^(1/2))^(1/3))
有三个根，图上看的话-400左右一个，-160左右一个，650左右一个.
MATLAB的答案就是这个..