Using Coefficient on an equation

*To*: mathgroup at smc.vnet.net*Subject*: [mg95433] Using Coefficient on an equation*From*: carlos at colorado.edu*Date*: Sun, 18 Jan 2009 05:33:11 -0500 (EST)

If f=a*x^2+b*x+c, Coefficient[f,x^2] obviously returns a. But if f=a*x^2+b*x+c==0, it returns 0. The problem arose using the Calculus`VariationalMethods` package. It (unfortunately) returns the Euler-Lagrange equations as such, so I have to remove the useless ==0 appendage for Coefficient to work properly. Is there a simple direct way out?

**Follow-Ups**:**Re: Using Coefficient on an equation***From:*"Scot T. Martin" <smartin@deas.harvard.edu>

**Re: Using Coefficient on an equation***From:*DrMajorBob <btreat1@austin.rr.com>