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MathGroup Archive 2000

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Re: transposing an equation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg26279] Re: transposing an equation
  • From: Christopher Deacon <cdeacon at physics.mun.ca>
  • Date: Sun, 10 Dec 2000 00:19:51 -0500 (EST)
  • Organization: Memorial University
  • References: <90kq3d$r25@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

I don't want to solve a quadratic equation for x (That would be too easy!) 
What I want is x expressed as polynomial in y.

So if y= 2x^2 +4x -8, how do I obtain values for the constants A, B, C in 
the equation x=Ax^2+Bx +C ?

Chris


Christopher Deacon wrote:

> Suppose y=a x^2+b x +c.
> 
> How can I get Mathematica to solve for x (i.e., x=Ay^2+By+C) and give me
> the values for the constants A,B,C?
> 
> Chris
> 
> --
> +-----------------------------+----------------------------+
> |       Christopher Deacon    |         (709) 737-7631
> | Dept of Physics and Physical|   cdeacon at physics.mun.ca
> |         Oceanography
> | Memorial University of Nfld
> +----------------------------+-----------------------------+
> |                http://www.physics.mun.ca/~cdeacon
> +----------------------------------------------------------+
> 
> 
> 
> 
> 
> 




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