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

• To: mathgroup at smc.vnet.net
• Subject: [mg113465] Re: How to isolate the constant in a two variable equation?
• From: "Nasser M. Abbasi" <nma at 12000.org>
• Date: Sat, 30 Oct 2010 04:35:55 -0400 (EDT)
• References: <iae7ok$7qd$1@smc.vnet.net>
• Reply-to: nma at 12000.org

On 10/29/2010 3:30 AM, Eduardo M. A. M.Mendes 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?


one way:


In[92]:= Clear[x,y]
eq=4x*x+3y*y+2x*y+1;
Coefficient[Coefficient[eq,x,0],y,0]

Out[94]= 1

--Nasser