From: Loydlin <Loyd>
To: Teacher2Teacher Public Discussion
Date: 2001113009:19:37
Subject: Re: Algebra

I too had the proof at one time.  It is based up on dividing by zero. 
At the beginning of the problem, you set a=b and then later divide by
a-b.  

Many students I tutor, have not been exposed to the idea that you
can't divide by zero.  

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