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Re: How to isolate the constant in a two variable equation?
*To*: mathgroup at smc.vnet.net
*Subject*: [mg113484] Re: How to isolate the constant in a two variable equation?
*From*: "Eduardo M. A. M.Mendes" <emammendes at gmail.com>
*Date*: Sat, 30 Oct 2010 04:39:28 -0400 (EDT)
Hello
Many many thanks. It worked fine but I had to use Expand before issuing the
command.
Cheers
Ed
From: Thomas Dowling [mailto:thomasgdowling at gmail.com]
Sent: Friday, October 29, 2010 9:06 AM
To: Eduardo M. A. M.Mendes
Subject: [mg113484] Re: How to isolate the constant in a two variable
equation?
Hello,
expr = 4 X*X + 3 Y*Y + 2 X*Y + 1
Select[expr, FreeQ[#, _Symbol] &]
or
Select[expr, FreeQ[#, X | Y] &]
is the way I would do it. Tom Dowling
On Fri, Oct 29, 2010 at 11:30 AM, Eduardo M. A. M.Mendes
<emammendes at gmail.com> wrote:
Hello
I know that Coefficient can isolate the coefficient relate to the variables
in an equation but I wonder how the constant could be retrieved.
Something like
4X*X+3Y*Y+2X*Y+1
How to get to isolate the constant 1?
Many thanks
Ed
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