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Re: Simplify and Gather Terms in a Polynomial

• To: mathgroup at smc.vnet.net
• Subject: [mg46445] Re: [mg46434] Simplify and Gather Terms in a Polynomial
• From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
• Date: Thu, 19 Feb 2004 03:01:52 -0500 (EST)
• References: <200402180536.AAA14436@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

On 18 Feb 2004, at 06:36, sabbri wrote:

> I have two equivalent polynomial expressions. In the second, which
> should derive from the first, terms are gathered respecting to a
> particular variable. for example:
>  y(x+ x^2)
> I want to make it gathered for x
> x(y+yx)
> How can I give this command?
>
>
>

Probably the simplest way is:

<<Algebra`Horner`

Horner[y*(x + x^2), x]

x*(x*y + y)

You can also do this using PolynomialReduce:


x*PolynomialReduce[y*(x + x^2), x][[1,1]]


x*(x*y + y)


Andrzej Kozlowski
Chiba, Japan
http://www.mimuw.edu.pl/~akoz/

• References:
  • Simplify and Gather Terms in a Polynomial
    • From: sabrinacasagrande@hotmail.com (sabbri)