What's wrong with this assuming?

*To*: mathgroup at smc.vnet.net*Subject*: [mg111095] What's wrong with this assuming?*From*: Sam Takoy <sam.takoy at yahoo.com>*Date*: Tue, 20 Jul 2010 03:43:07 -0400 (EDT)

Hi, I have a situation where I have to simplify an expression that contains x and h, but x is given implicitly by h, so I can't explicitly eliminate it. So here's a simpler example that I'm trying and it does nothing: Assuming[x^2 + x == h, (x^2 + x)^2+h] // FullSimplify Is there a way to make this work? Thanks!