how to prevent decomposition

• Subject: how to prevent decomposition
• From: Valery Pipin
• Date: Wed, 10 Dec 2003 17:31:13 +0800

I'm stuck about one "simple" problem
I have to keep the "b^2-1" from decomposition to "(b-1)*(b+1)"
and don't  know how to reach this. Is there a way to keep the form like 
"b^2-1"  or (b+1)^2  from expansion?

rgds,
V

 

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