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MathGroup Archive 2000

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Re: transposing an equation

  • To: mathgroup at
  • Subject: [mg26276] Re: transposing an equation
  • From: "Lutz Schaefer" <lschafer at>
  • Date: Sun, 10 Dec 2000 00:19:48 -0500 (EST)
  • Organization: Advanced Imaging Methodology Consultation
  • References: <90kq3d$>
  • Sender: owner-wri-mathgroup at

Christopher Deacon <cdeacon at> wrote in message
news:90kq3d$r25 at
> 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
> values for the constants A,B,C?
> Chris

that is not too hard. Just use the 'Solve' function, like

Solve[ a x^2 + b x + c == y, x ]

solves your polynomial (two solutions) and writes it in terms of x. If you
read the help you will find some helpful examples too.


Lutz Schaefer
Advanced Imaging Methodology Consultation
16-715 Doon Village Rd.
Kitchener, Ontario
N2P 2A2, Canada
Email: lschafer at
Phone, FAX: (519)-894-8870

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