Q&A #19812

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

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From: Robert

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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