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Re: FindRoot

  • To: mathgroup at smc.vnet.net
  • Subject: [mg98723] Re: FindRoot
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Fri, 17 Apr 2009 04:26:43 -0400 (EDT)
  • References: <gs6pg3$h2f$1@smc.vnet.net>

Hi,

Solve[x^3 - 4 a^2 x - 2 a^3 == 0, x]
?

but nobody can tell you which one is real.

Regards
   Jens

Miguel wrote:
> Hi all,
> How can I to find the reals roots of a cubic equation in simbolic
> form: For example,
> 
> Find the roots of
> x^3-4a^2x-2a^3==0
> 
> where "a" is real and a>0.
> 
> Thanks
> 


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