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how to have a blind factorization of a polinomial?

• To: mathgroup at smc.vnet.net
• Subject: [mg54049] how to have a blind factorization of a polinomial?
• From: foice <NONfoiceSPAMMARE at tiscalinet.it>
• Date: Wed, 9 Feb 2005 09:27:21 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

i'd like to have a "froced" or "blind" factorization of an expression so pass 

from
Sqrt[x+y]

to
Sqrt[x(1+x/y)]

and similar.
This kind of operation is very usefull when you need to judge the relative wight of
various term in a polinomial in order to make wise approximations into algebra
manipulations of your physical problem.

But how can I get such very simple algebric operation into Mathematica?

Thanks
Roberto

-------------------------------------------------------------
tutto ciò che ho scritto è sempre In My Humble Opinion (IMHO)
probabilmente l'ho scritto di fretta, quindi scusate se sono stato sbrigativo.