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-4² = -16


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Author Topic: -4² = -16  (Read 13312 times)

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Offline ybbun

-4² = -16
« on: April 22, 2004, 03:51:09 am »
It IS true.

Any LUEsers here?

Offline SadisticMystic

-4² = -16
« Reply #1 on: April 22, 2004, 05:20:18 am »
- = unary operator and takes precedence over everything

No.

Offline yse

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-4² = -16
« Reply #2 on: April 22, 2004, 05:30:02 am »
I'm not a LUEser, but

-4^2 = -(4^2) = -(16) = -16

Quite simple, actually.

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Offline F-Man

-4² = -16
« Reply #3 on: April 22, 2004, 12:13:44 pm »
Quote
I'm not a LUEser, but

-4^2 = -(4^2) = -(16) = -16

Quite simple, actually.
...But -4^2 does not equal -(4^2), as far as I know.

Oh and I am proud of not being a LUEser, kthx.

Offline Rolken

-4² = -16
« Reply #4 on: April 22, 2004, 05:37:01 pm »
ybbun is correct; (-4)² = 16, -4² = -16. Mathematics is not computer science, unary operators are irrelevant.
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Offline ybbun

-4² = -16
« Reply #5 on: April 23, 2004, 03:05:00 am »
2 or 3 topics with the same title as this got over 200 replies in LUE.
I can't go there any more, but I don't really care.

-4² = -16
« Reply #6 on: April 23, 2004, 06:34:44 am »

Offline CosmicFalcon

-4² = -16
« Reply #7 on: April 23, 2004, 12:38:32 pm »
Ow my ears.

Anyways...

-(4^2) = -16
-4^2 =! -(4^2)
(-4^2) = -4^2
-4^2 = 16



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Offline Rolken

-4² = -16
« Reply #8 on: April 23, 2004, 10:42:33 pm »
Quote
-(4^2) = -16
-4^2 =! -(4^2)
(-4^2) = -4^2
-4^2 = 16
Still wrong, because mathematics is still not computer science; "-" functions the same way whether it is being used as a negative or for subtraction, the only difference being that the former method has an implied 0 in front (ie, -5 = 0-5).

There is a reason it works this way. Consider this:

x = -4²
y = 2-4²

I think most people will agree that y = 2 - (4²) = -14, because powers take precedence over additive operations. It would be disjointed for the first example to work differently because of the lack of a number (or if you don't think so, work with polynomials more and you'll change your mind).

Actually, that's a good example as well - nobody construes -x² as being (-x)², right? Well, why should it work any differently with a number as with a symbol? No other operations change how they work based on whether they operate on numbers or symbols.
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-4² = -16
« Reply #9 on: May 25, 2004, 03:19:17 am »
I thought I was smart at maths cause i know what 2111squared is and I'm in year 5 but this is weird.
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Offline Taco

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-4² = -16
« Reply #10 on: May 25, 2004, 08:08:25 am »
They are talking about college math or something

I'm only in geometry...

so...

*steps away*

BTW, Theorems are no fun  :D

Offline F-Man

-4² = -16
« Reply #11 on: May 25, 2004, 10:37:05 am »
Quote
I thought I was smart at maths cause i know what 2111squared is and I'm in year 5 but this is weird.
Yeah... but this topic was dead, you didn't have to revive it just so we realise you're only 10 years old...

Offline Chaos Angel 73

-4² = -16
« Reply #12 on: July 23, 2004, 08:08:54 pm »
It is true...
"If you don't like the world, change yourself first. If you don't like that idea, then close your eyes and ears and live in solitude.
And if you don't like that idea..."
                                          --Motoko Kusanagi

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