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Math Forum » Discussions » sci.math.* » sci.math.independent

Topic: -1 x -1 ?
Replies: 29   Last Post: May 13, 2009 9:01 AM

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mensanator

Posts: 5,039
Registered: 12/6/04
Re: -1 x -1 ?
Posted: Jan 21, 2009 9:03 PM
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On Jan 21, 7:51 pm, Tay <wintct...@gmail.com> wrote:
> -1 *-1 = 1 huh?
>
> Well, think of it like this:
>
> The minus (negative) signs cancel eachother out:
>
> (-1)(-1)=
>
> [(-)(-)](1x1)=
>
> So then, multiply the + and numbers:
>
> (+)(1x1)=
>
> You've got positive 1:
>
> +1
>
> It's so simple.

If North is positive and you're facing South,
what's your displacement if you take a step backwards?

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