Services & Resources / Wolfram Forums / MathGroup Archive

MathGroup Archive 2011

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Simplifying radicals

  • To: mathgroup at
  • Subject: [mg122224] Re: Simplifying radicals
  • From: Alexei Boulbitch <Alexei.Boulbitch at>
  • Date: Fri, 21 Oct 2011 06:24:48 -0400 (EDT)
  • Delivered-to:

Hi, Tom,

There had been a package RealOnly in the past (i.e. before M6) for this purpose, and I am curious what replaces it now.

In between may be this:



can help.

Best, Alexei

Hi,  I'm working with some introductory topics in radicals.

I know that Mathematica assumes things about the domain used in

problems,  so the principal cube root of a negative number will be

complex... or something like that..

I'm way down at the lower high school level simply working with cube

roots of negative numbers and wanting a negative number result.

I know there are ways of using assumptions and solving over the reals, etc.

Is there any EASY way I can simply ask for the cube root of -729 and get -9?


Alexei BOULBITCH, Dr., habil.


ZAE Weiergewan,

11, rue Edmond Reuter,

L-5326 Contern, LUXEMBOURG

Office phone :  +352-2454-2566

Office fax:       +352-2454-3566

mobile phone:  +49 151 52 40 66 44

e-mail: alexei.boulbitch at<mailto:alexei.boulbitch at>

  • Prev by Date: Re: R: Ticks without labels
  • Next by Date: Re: Low CPU usage
  • Previous by thread: Re: Simplifying radicals
  • Next by thread: Re: Simplifying radicals