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Re: Please remind me why -3^2 = -9
Posted:
Nov 18, 2012 10:00 AM
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I'm wishing I had added an agreement with the sentence below about convention.
And that no student will properly misinterpret 7 - 3^2, but the problem is the isolated -3^2. Significantly, with no space after the hyphen.
Phil
On Nov 18, 2012, at 2:48 AM, Beth Hentges <Beth.Hentges@century.edu<mailto:Beth.Hentges@century.edu>> wrote:
7-3^2 means 7+-3^2 means 7+-1*3^2
The point is that it is all convention, there are reasons for choosing the conventions we do.
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