Date: Dec 4, 2012 10:40 AM
Author: Joe Niederberger
Subject: Re: In "square root of -1", should we say "minus 1" or "negative<br> 1"?
R. Hansen says:

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I was thinking...

(3) * (-2) = (-2) + (-2) + (-2) = -2 - 2 - 2

Or the other way around ...

(-2) * (3) = - 3 - 3 (repeated subtraction) (I just realized so much for crabtree's subtracted once from itself theory, that was an unexpected bonus)

And with two negatives...

(-2) * (-3) = - (-3) - (-3) (thus, when you are subtracting a minus you are actually adding)

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That's kind of cute -- I like it.

But I think to make it solid you would have to

define multiplication of (+)x(-) and (-)x(+)

first, and treat them asymmetrically!

Cheers,

Joe N