#1
Alright, here's the deal, I'm struggling with something in maths and I know a lot of you guys here are mathematicians, so I thought I'd give it a try.

I feel like somewhat of a dumb ass, as this is elementary mathematics, but I've just never been very good at maths.

Anyway, what's the difference between (-3) to the power of 2 and -3 to the power of 2?


Basically, the same equation, but one is bracketed before the index, and the other isn't.

I would assume they were both -9, but I have a feeling I'm totally wrong as you wouldn't express the same equation in two different ways.

Thanks for any help.

/Moron
Proud owner of an Engl Thunder 50 Reverb and an Ibanez S470

"The end is extremely fucking nigh..."
#2
(-3)^2

Is 9. It's -3 x -3, two negatives multiplied make a positive.

-3^2

Well, technically some might say this is the same, but to say they're different, you would say;

"3^2 = 3 x 3 = 9"

Then as it's -, make it -9.
Co-President of UG's Tubgirl Virgins Club

#3
Quote by JamieB
(-3)^2

Is 9. It's -3 x -3, two negatives multiplied make a positive.


Of course! I forgot about that rule.

Thanks, man.
Proud owner of an Engl Thunder 50 Reverb and an Ibanez S470

"The end is extremely fucking nigh..."
#5
I would've answered, but Jamie did.

Oh well.
Quote by Td_Nights
Prank calls?

What are you, 10?

Be a man and go take a shit on someone's car.

Quote by Fate_of_Mind
I skimmed through, saw pregnancy test, and "why is there blood". I'm going to assume you just punched her in the ovaries, problem solved.


Xbox Live GT: VRSlashGnR
#6
Quote by iSlash
I would've answered, but Jamie did.

Oh well.
If only I decided to post that in every thread I would have otherwise not posted in...


(Excluding the Jamie part...)
#7
Quote by yawn
If only I decided to post that in every thread I would have otherwise not posted in...


(Excluding the Jamie part...)

Quote by Td_Nights
Prank calls?

What are you, 10?

Be a man and go take a shit on someone's car.

Quote by Fate_of_Mind
I skimmed through, saw pregnancy test, and "why is there blood". I'm going to assume you just punched her in the ovaries, problem solved.


Xbox Live GT: VRSlashGnR
#9
Quote by Smokey Amp
Alright, here's the deal, I'm struggling with something in maths and I know a lot of you guys here are mathematicians, so I thought I'd give it a try.

I feel like somewhat of a dumb ass, as this is elementary mathematics, but I've just never been very good at maths.

Anyway, what's the difference between (-3) to the power of 2 and -3 to the power of 2?


Basically, the same equation, but one is bracketed before the index, and the other isn't.

I would assume they were both -9, but I have a feeling I'm totally wrong as you wouldn't express the same equation in two different ways.

Thanks for any help.

/Moron



first one the answer is +9 the secong one he answer is probably -9 but its not very clear.

THe first one is Definitely +9 because you also square the - and it follows the double negative rule.
#10
if you put "-3^2" into a calculator, it gives -9
if you put "(-3)^2" into a calculator, it gives 9

it's a "-9" in the 1st example because the "squared" funtion is more dominant than the minus sign.
and it's a "9" in the second example because the brackets take priority over the squaring.
"And after all of this, I am amazed...

...that I am cursed far more than I am praised."
Last edited by Sol9989 at Oct 4, 2007,
#11
they should both be +9 shouldn't they?

nvm im wrong.
PPPPPPPOSTFINDER
Last edited by breadstick at Oct 4, 2007,
#12
....
(-3)^2....means you take the negative 3 and you square it that gives you nine...

-3^2 ....means that you take the *opposite of the equation.
..3 raised to the 2nd power takes priority.
so -3^2 is the opposite of 3^2

3^2= 3x3= 9

(-3)^2= -3x-3= 9

-3^2 = (-1) x 3x3= -9

you have to look at the equation as a representation of a number....

let ---> 3^2= Z
-Z would be understood as -1 x Z= -Z

so -3^2 is the same as -(3^2)...understood as ... -1 (3^2)

just break it up...

3^2 is the same as ......1 x (3^2)..the multiplicative property of one states that everything
multiplied times 1 is itself...so we don't look at it as being multiplied by one...but the
calculator actually multiplied it by one...

if you look at 3^2 as ...3^2= Z

Z is understood as ....1Z ...or 1 times Z...0r 1(Z)
-2Z is understood as .... ...-1(2Z)

its tricky because you dont have to separate the one from the equation..

3Z ...would be 3(3^2) ...which would be 3 x 9 = 27

that makes...

-3^2.....-Z.....which is .... negative one times ---> three squared..


whenever a number is raised to a power...solve it first...
then take care of the sign in front....

btw...

(-3)^2....since -3 is in parenthesis...it has priority

-3 is an equation..... 1 times -3...the multiplication times 1 is understood..but
done by the calculator...

so its actually ...one times negative three---->square the answer

just like (5+1)^2.....would be 6^2

the lesson is to be aware of the multiplication of one and negative one
I bet Charlie Brown's teacher's name was Mrs.Hammett
Last edited by Washburnd Fretz at Oct 4, 2007,