Re: a simplification problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg55248] Re: [mg55172] a simplification problem*From*: Bob Hanlon <hanlonr at cox.net>*Date*: Thu, 17 Mar 2005 03:30:29 -0500 (EST)*Reply-to*: hanlonr at cox.net*Sender*: owner-wri-mathgroup at wolfram.com

It isn't equal to -1 (-1)^(1/3)//N 0.5000000000000001 + 0.8660254037844386*I You want a real x such that x^3 is -1 Reduce[x^3==-1,x,Reals] x == -1 Simplify[x^3==-1,Element[x,Reals]] x == -1 Bob Hanlon > > From: Hui Fang <fangh73 at xmu.edu.cn> To: mathgroup at smc.vnet.net > Date: 2005/03/16 Wed AM 05:35:49 EST > To: mathgroup at smc.vnet.net > Subject: [mg55248] [mg55172] a simplification problem > > Dear All, > > My questions is simple: > How do I simplify (-1)^(1/3) to -1? > > Thanks! > > Bob Hanlon Chantilly, VA