[newbie question] solving fifth order polynomial equation
Subject: [newbie question] solving fifth order polynomial equation
From: Hugo Coolens
Date: Wed, 17 Jan 2007 16:55:55 +0100 (CET)
When solving the following equation
solve(1+11*s+45*s^2+84*s^3+70*s^4+21*s^5=0);
Maxima shows two real solutions and three complex ones in stead of five
real solutions.
Besides the solutions s=-1 and s=-1/3, I think there are also a real
solutions around s=-2.63024e-01, s=-4.08991e-01 and s=-1.32799
Can anyone explain what is going wrong and how to solve it?
reagards,
hugo