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Topic: Re: Please remind me why -3^2 = -9
Replies: 6   Last Post: Nov 19, 2012 8:58 AM

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Phil Mahler

Posts: 126
Registered: 12/6/04
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.


On Nov 18, 2012, at 2:48 AM, Beth Hentges <<>> 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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