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 > +----------------------------------------------------------+ > > > > > >