Re: Simplify and Gather Terms in a Polynomial
- To: mathgroup at smc.vnet.net
- Subject: [mg46443] Re: Simplify and Gather Terms in a Polynomial
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Thu, 19 Feb 2004 03:01:50 -0500 (EST)
- Organization: Universitaet Leipzig
- References: <c0uu2k$e74$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
- Sender: owner-wri-mathgroup at wolfram.com
Hi, Collect[] would do that for a polynomials. But your form x *(y+y*x) is not in the classic form of a polynomial in x and you must do that by hand Expand[y(x + x^2)] /. x^n_.*a_. + x_^m_.*b_. :> x*(x^(n - 1)*a + x^(m - 1)*b) Regards Jens 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?