Re: quartic equation

• To: mathgroup at smc.vnet.net
• Subject: [mg108752] Re: quartic equation
• From: dh <dh at metrohm.com>
• Date: Tue, 30 Mar 2010 05:01:36 -0500 (EST)
• References: <hoq4gb\$164\$1@smc.vnet.net>

```Hi Leslaw,
assume ci is the coefficient of x^i. Then we can write:

poly = c0 + c1 x + c2 x^2 + c3 x^3 + c4 x^4;
Solve[poly == 0, x]

This gives the roots in terms of ci.
Daniel

On 29.03.2010 13:55, Leslaw Bieniasz wrote:
> Hi,
>
> I am totally unexperienced in MATHEMATICA, and I am looking for some
> advice. I need to solve a quartic equation symbolically, that is to factor
> a fourth order polynomial given in the power base. The coefficients
> of the polynomial are complicated expressions of a number of parameters,
> and I need to obtain expressions for the roots as functions of these
> parameters. Is there any way to do this? I would appreciate if
> anybody can send me some simple example code showing how this sort
> of problems can be solved.
>
> Leslaw
>

--

Daniel Huber
Metrohm Ltd.
Oberdorfstr. 68
CH-9100 Herisau
Tel. +41 71 353 8585, Fax +41 71 353 8907
E-Mail:<mailto:dh at metrohm.com>
Internet:<http://www.metrohm.com>

```

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