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  #1  
Old 08-23-2007, 06:22 PM
TheDon's Avatar
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Do this math problem...

-3^2(4)+7(2)/14(3)^2+(3-7)^2/8(2)-(-8)^2


/= divide

seriously... Did PEMDAS and its coming out weird compared to the calculator..

I got -18

calculator.. says -54


my calc is saying that -3^2= -9

but ... -3*-3= 9!.... wtf is up texas instruments


thanks...

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  #2  
Old 08-23-2007, 06:57 PM
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-87
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  #3  
Old 08-23-2007, 06:59 PM
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Quote:
Originally Posted by Howitzer View Post
-87
http://www.google.com/search?hl=en&q=-3%5E2%284%29%2B7%282%29%2F14%283%29%5E2%2B%283-7%29%5E2%2F8%282%29-%28-8%29%5E2&btnG=Google+Search


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  #4  
Old 08-23-2007, 07:01 PM
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busted
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  #5  
Old 08-23-2007, 07:19 PM
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Your calculator is doing -3*3

You have to use parenthesis i think. (-3)^2

When in doubt I always use parenthesis.
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  #6  
Old 08-23-2007, 07:56 PM
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My dear aunt sally uses RPN.
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  #7  
Old 08-23-2007, 08:01 PM
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Quote:
Originally Posted by Botnst View Post
My dear aunt sally uses RPN.
I can't use a regular calc RPN til I die.
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  #8  
Old 08-23-2007, 08:14 PM
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20 years ago ( Has it been that long?) I was introduced to RPN. The guy explained how 5 enter 2 X to multiply 5 x 2. I thought it odd, but adapted. The he told what it was called, RPN. I said "you're kidding" This was when polish jokes were all the rage.
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  #9  
Old 08-23-2007, 08:52 PM
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Dude, if a teacher gave you this question, just tell him/her:
"yeah, we googled that math problem and the answer was -87, so it MUST be right"

=)
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  #10  
Old 08-23-2007, 09:09 PM
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When I learned 2 + 2 = 4, I thought math was over.
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  #11  
Old 08-23-2007, 09:17 PM
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Quote:
Originally Posted by Pete Geither View Post
When I learned 2 + 2 = 4, I thought math was over.
After I lurn't the E6B. It was over.
('til I went t' calege anywaze)
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  #12  
Old 08-23-2007, 09:37 PM
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-3^2 is indeed -9. What's PEMDAS?

By the way, this is an arithmetic problem.
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  #13  
Old 08-23-2007, 10:47 PM
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how can -3 be -9... a negative times a negative is always positive

Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Please Excuse My Dear Aunt Sally
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  #14  
Old 08-23-2007, 10:52 PM
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seriously.. wtf


I don't like this.. I did calculus .. no problem.. got an A.. but this crap they put me in by default( my score.... 1 point to low to be put into college algebra is pissing me off)...


I put all my problems into google and I got all of them wrong according to mutha funkn google...

Last edited by TheDon; 08-23-2007 at 10:58 PM.
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  #15  
Old 08-23-2007, 11:31 PM
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Quote:
Originally Posted by TheDon View Post
seriously.. wtf


I don't like this.. I did calculus .. no problem.. got an A.. but this crap they put me in by default( my score.... 1 point to low to be put into college algebra is pissing me off)...


I put all my problems into google and I got all of them wrong according to mutha funkn google...
Seriously, without proper parentheses, you can get any result that you wish. When I started with it, I would get a fraction for the second group (14/14 x 9). But, with proper parentheses, the result is entirely different.

Jeff has only one interpretation by Google...........there are many others.

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