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...

-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


:D

busted

Your calculator is doing -3*3

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

When in doubt I always use parenthesis.

My dear aunt sally uses RPN.

I can't use a regular calc RPN til I die.

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.

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"

=)

When I learned 2 + 2 = 4, I thought math was over.

After I lurn't the E6B. It was over. :D
('til I went t' calege anywaze)

-3^2 is indeed -9. What's PEMDAS?

By the way, this is an arithmetic problem.

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

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.

I think the calculator "sees" -3^2 like (-1)(3)(3)

I disagree that you can get multiple correct answers. There are rules that all arithmetic follows. Lacking parentheses, operations follow a default, order of operations. Follow the rules and will get THE correct answer, regardless of what google, or any other " authority" says.
One of the problems with "stretch" education is that it removes the discipline requuired to get correct answers.

You did it too!:D

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

I got

-36+9+1-64

Second group is the most ambigious as Brian noted.

Is it also 9?

This would be a good time to develop the habbit of meeting with your prof or a school study assistance dept to get the the ideas worked out early on... I guess that's what you are doing here but I think you might find the former two options more informitive.
Smart people like yourself are usually resistant to seeking help in their studies. but instruction is not always clear, and you'll get further faster and easier if you take as much clarification as you can.
I wish I was better at arithmetic... you're a lot closer to understanding this problem than I am... and the phrasing may be vague (as Brian said)

http://mathforum.org/library/drmath/view/55713.html

The eariler you start to seek out help when you are having a hitch, the better off you'll be but a lot of students won't do it because they want to learn on their own. Kind of silly when the reason for being in school is to learn as much as you can from 'teachers'

Good luck ... I know you'll be dancing on these problems graves in no time.

I had to. I thought "^" ment "the guy above my post"

Yeah, I dont know what ^ means, but I do financial math, probabilities, regressions. Aitn never seen a ^. Use RPN everyday with my trusty HP 12c. Define ^ and I'll cruch that algebra in a second.

But, as is said ( and I do teach college finance on occassion) IF your professor actually speaks English well, I'd ask him/her AFTER I made an attempt.

I keep a 12c in the car but I use my trusty 19BII at the office, its had a rough life so electrical tape keeps it together I'll post a pic of it.

Howie, you a finance guy too?

I try to be. :D

This is correct. -3^2 is parsed as -(3^2). Always.

I think, after a days consideration, that x^2 = x squared.

-3^2. Follow your "formula." "Exponents" comes before "subtraction."

I don't know why you bother to put "multiplication" before "division" and "addition" before "subtraction," but I suppose that this is modern eduction in action.

I don't do math, period.

Hell man, not this kind. An I do, do it. Guess the modern heiropglyphics are beyond me.

-3^2 according to the instructor.. is positive 9...

with PEMDAS.. I work left to right

In that case would you consider selling my house for me at a commission of (100% X -1)?

LOL.

Back in the day Realtors were required to know RE math inside and out but most of it has been removed from licensing requirements.

I sure hope my Realtor can do math..I know doctors have to take at least up to Calc 3!...

I'll only be able to take Calc 2 at the CC.. Calc 3 and the rest at state..

I think in December I'll take the CPT and see if that score will get me into Algebra...


I'm off to do some paragraph for comp... my diagnostic writing from Wednesday showed if I took the final today I would score a B+ for the class

The problem is there are so many scenerios that its tough for them to get the proper data to do it in the field, its would not be easy for them to compute a 3-2-1 I/O fully amortizing hybrid while showing a home.

Sure as long as we write 6% on the contract!:D

Are you using a TI83?

If it was -3^2, the correct answer is -9
If it was (-3)^2, the correct answer is 9

:D Well think about my offer... I'll settle for 51% of last years market value, so it should be easy to move.

that makes no sense...

I can see it being negative if -(3)^2

but... (-3)^2 and -3^2....

-3*-3 aka -3^2=9

By definition, -3^2 implies -(3)^2 because the operations of subtraction and addition are subservient to multiplication and division.

Therefore -3^2 gives a different result than (-3)^2.

Like I mentioned above, it's the parentheses that cause the result to change completely, depending on how they are utilized.

I hate -3^2....

I will have the answer on monday... I even asked him today.. -3^2... is.. 9.. ...

I believe he's technically incorrect. But, clearly, he's implying (-3)^2. I'd like to hear the argument for the lack of parentheses...........

From the link I posted eariler:
"When we're working with variables, if we see -x^2, we interpret it in
the second way, as -(x^2), because squaring (or any exponentiation)
takes precedence over negation (or any multiplication; -x is treated
as -1*x.

When you have numbers only, as in -9^2, it's not at all clear that we
should treat it differently from -x^2. However, some will argue that
it should, because -9 represents a single number, not an operation on
a number. Thus, some will interpret -9^2 as (-9)^2, while others will
read it as -(9^2)."
This seems a question begging for resolution, perhaps if we could establish some rules for math we could move on and focus our efforts on world peace.

That's the fundamental issue. Is the negative sign in front of the digit an operation and, if so, the interpretation is -(9^2). Parentheses are not required. -9^2 is the same thing.

But, if it's simply a negative number, the interpretation is (-9)^2.

Two different results. But, I do see the possibility of getting the positive result.

Arguably the greatest mathematician in human history, Carl Friedrich Gauss, said, "Mathematics is the queen of sciences and arithmetic is the queen of mathematics."

Exponentiation is nothing more than multiplication and multiplication is nothing more than addition. Standard notation and operations have been agreed upon for a couple of centuries, I reckon. Why not avail ourselves of the mathematical conventions?

http://en.wikipedia.org/wiki/List_of_basic_arithmetic_topics

Bump for the solution. :D

Math makes my head hurt. I like pictures and concrete stuff better than abstract things.

A little math might make your head catch on fire..............;)