Re: help with polynomial solutions

• To: mathgroup at smc.vnet.net
• Subject: [mg81798] Re: [mg81704] help with polynomial solutions
• From: DrMajorBob <drmajorbob at bigfoot.com>
• Date: Wed, 3 Oct 2007 06:15:39 -0400 (EDT)
• References: <29790196.1191389340333.JavaMail.root@m35>
• Reply-to: drmajorbob at bigfoot.com

```SolveAlways[a x^2 + b x + c == x^2, x]

{{a -> 1, b -> 0, c -> 0}}

Bobby

On Tue, 02 Oct 2007 04:28:51 -0500, Jules P. Aronson <aronson at nlm.nih.gov>
wrote:

> I could not get mathematica to solve the following class of problems.
>
> If f(x) and g(x) and two polynomials then a solution to force f(x) to be
> equal to g(x) is the equate the coefficients of f(x) to be the same as
> those of g(x).  For example,
>
> a x^2 + b x + c  == x^2, has a solution, a=1, b=0, c=0.
>
> If I do the following in mathematica:
>
> Solve[a x^2 + b x + c == x^2, {a,b,c}] or using Reduce, I do not get the
> desired solution.
>
> Can someone tell how to force mathematica to solve such problems.
>
>

--

DrMajorBob at bigfoot.com

```

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