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Re: eliminate x

  • To: mathgroup at smc.vnet.net
  • Subject: [mg98251] Re: eliminate x
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Fri, 3 Apr 2009 04:39:43 -0500 (EST)
  • Organization: Uni Leipzig
  • References: <gr0gl4$966$1@smc.vnet.net>
  • Reply-to: kuska at informatik.uni-leipzig.de

Hi,

x == (y /. Solve[x*x + x + 5 + 8*x*x*x == 0 /. a_ + x :> a + y,
      y][[1]])

??

Regards
   Jens

magdamoczydlowska at gmail.com wrote:
> Dear All,
> 
> I have simple equation x*x+x+5+8*x*x*x=0 and I would like to eliminate
> from this equation x  but in this way to recaive x=- x*x-8*x*x*x-5. So
> the x with the lowest power is always on tle left site.
> 
> Best regards and thank you for help,
> Magdalena
> 


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