Re: Need help for a simple equation
- To: mathgroup at smc.vnet.net
- Subject: [mg12856] Re: [mg12813] Need help for a simple equation
- From: Hugh Walker <hwalker at gvtc.com>
- Date: Wed, 17 Jun 1998 00:27:59 -0400
- Sender: owner-wri-mathgroup at wolfram.com
Tae-Wan Kim <tae-wan.kim at sdrc.com> writes
>My problem is as follows:
>f(x, y) = a x^2 + b xy + c y^2 + d x + e y + f = 0 (1)
>partial derivative of f(x,y) with respect to x:
>dfx(x, y) = 2 a x + b y + d = 0 (2)
>I'd like to solve (1) and (2) using Mathematica.
********************
Hello Tae-wan:
Q = a x^2 + b x y + c y^2 + d x + e y + f; eq = {Q==0, D[Q,x]==0};
Solve[eq,{x,y}]
Cheers!
Hugh Walker
Professsor Emeritus
University of Houston
Gnarly Oaks