Teacher2Teacher 
Q&A #19812 
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From: Robert <cav@verogem,comReference> To: Teacher2Teacher Public Discussion Date: 2009090608:35:30 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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