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Q&A #19812

Teachers' Lounge Discussion: Explaining concept -x=2 is equal to x=-2

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From: Robert <cav@verogem,comReference>
To: Teacher2Teacher Public Discussion
Date: 2009090607:35:30
Subject: Reference

	
see the Math Forum:Ask Dr. Math' FAQ's "Negative times Negative Equals
a Positive?" The Ogden Nash quotation is worth memorizing.  I wonder
why there  has been no public discussion on this elementary but most
important property? Robert

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