Re: silly questions?
- To: mathgroup at smc.vnet.net
- Subject: [mg59077] Re: silly questions?
- From: Peter Pein <petsie at dordos.net>
- Date: Thu, 28 Jul 2005 02:26:51 -0400 (EDT)
- References: <dc77me$k74$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Kent Holing schrieb: > Why does not (x^5-32)/(x-2)//FullSimplify in Mathematica work? > Compare with Factor[x^5-32]//InputForm which returns (-2 + x)*(16 + 8*x + 4*x^2 + 2*x^3 + x^4). > So why does not the first command just return 16 + 8*x + 4*x^2 + 2*x^3 + x^4? > As in a factorization above, how is the easiest way to pick automatically (by a function) the factors of say degree >=2, if any ? > > Kent Holing > The rational expression appears more simple to Mathematica: LeafCount[(Print[#1]; #1)&[FullSimplify[(x^5 - 32)/(x - 2)]]] (-32 + x^5)/(-2 + x) 11 but - on the other hand: LeafCount[(Print[#1]; #1)&[Cancel[(x^5 - 32)/(x - 2)]]] 16 + 8*x + 4*x^2 + 2*x^3 + x^4 18 -- Peter Pein Berlin http://people.freenet.de/Peter_Berlin/