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Re: How to isolate the constant in a two variable equation?

• To: mathgroup at smc.vnet.net
• Subject: [mg113495] Re: How to isolate the constant in a two variable equation?
• From: "Eduardo M. A. M.Mendes" <emammendes at gmail.com>
• Date: Sun, 31 Oct 2010 02:08:01 -0500 (EST)

Hello

Many thanks. It works too but it returns curly brackets.

Ed


-----Original Message-----
From: Bill Rowe [mailto:readnews at sbcglobal.net] 
Sent: Saturday, October 30, 2010 6:38 AM
To: mathgroup at smc.vnet.net
Subject: [mg113495] [mg113477] Re: How to isolate the constant in a two variable
equation?

On 10/29/10 at 6:30 AM, emammendes at gmail.com (Eduardo M. A. M.Mendes)
wrote:

>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?

In[4]:= Cases[4 X*X + 3 Y*Y + 2 X*Y + 1, _?(FreeQ[#, X | Y] &)]

Out[4]= {1}