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simplify problem

• To: mathgroup at smc.vnet.net
• Subject: [mg5137] simplify problem
• From: Tomasz Bieruta <bieruta at chemie.uni-halle.de>
• Date: Wed, 6 Nov 1996 01:32:57 -0500
• Organization: Martin-Luther-Universitat, Dept. Chemie, Inst. ANUC
• Sender: owner-wri-mathgroup at wolfram.com

I have following problem:

In[1]   u=(a+b)^2; v=(c+d)^2;
In[2]   uv=Expand[u+v]
Out[2]  a^2+2ab+b^2+c^2+2cd+d^2

How can I revers the above Operation, in this example from

a^2+2ab+b^2+c^2+2cd+d^2

I want to have (a+b)^2 + (c+d)^2.
Can someone help me, please ?

Tomasz B.

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e-mail: bieruta at chemie.uni-halle.de