December 28th, 2011, 02:33 AM

Exponents and negative numbers..
So I'm pretty new and terrible at all this, but I figured seeing as I'm off to uni next year I would get better at Math...
So anyway, I'm reading these notes: http://tutorial.math.lamar.edu/Classes/Alg/Preliminaries.aspx
And I get most of it fine, except stuff like this:
(10)^2 = 100, or (2)^4 = 16
It confuses me. Maybe those notes weren't the best thing to start on? :S
But that's all I'm having trouble with, so far...
Any help would be great, and any books/notes that helped you when starting out would be great :3
Thank you very much.
December 28th, 2011, 02:38 AM

Originally Posted by breadbox
So I'm pretty new and terrible at all this, but I figured seeing as I'm off to uni next year I would get better at Math...
So anyway, I'm reading these notes: http://tutorial.math.lamar.edu/Classes/Alg/Preliminaries.aspx
And I get most of it fine, except stuff like this:
(10)^2 = 100, or (2)^4 = 16
It confuses me. Maybe those notes weren't the best thing to start on? :S
But that's all I'm having trouble with, so far...
Any help would be great, and any books/notes that helped you when starting out would be great :3
Thank you very much.
I mean, 10x10 is obviously 100, so does that mean ignore the subtraction even though it gets the power? If so, why do you ignore it?
December 28th, 2011, 02:48 AM

You are kidding ...
Comments on this post
December 28th, 2011, 03:47 AM

Originally Posted by leszek31417
You are kidding ...
No...?
December 28th, 2011, 03:55 AM

Originally Posted by breadbox
No...?
Because 10^2 is = (10x10) isn't it? Which is 100, so I'm a little confused how it isn't a negative when the subtraction gets the power?
December 28th, 2011, 03:59 AM

Originally Posted by breadbox
except stuff like this:
(10)^2 = 100, or (2)^4 = 16
It confuses me.
Unless I am misunderstanding what your saying, maybe this is what you need to read:
Multiplying Negatives
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December 28th, 2011, 04:07 AM

[QUOTE=kicken]Unless I am misunderstanding what your saying, maybe this is what you need to read:
[url=http://www.mathsisfun.com/mult
Yes thank you, this is what I needed.
Good thing I'm used to feeling like an idiot
December 28th, 2011, 10:54 PM

You should probably read this too:
order of operations
And I get most of it fine, except stuff like this:
(10)^2 = 100, or (2)^4 = 16
Because 10^2 is = (10x10) isn't it? Which is 100, so I'm a little confused how it isn't a negative when the subtraction gets the power?
(10*10) does equal 100 and does equal 10^2; however, (10)^2 is not the same value  the parenthesis have actual meaning. Because terms inside parenthesis have higher operator precedence than the exponent operator, the negative sign stays with the ten and you have 10*10, which equals 100.
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Originally Posted by Spad
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December 29th, 2011, 12:12 AM

Originally Posted by breadbox
...
Good thing I'm used to feeling like ...
Don't !!!
It is OK to ask for explanations.