#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

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

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

#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.

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.

#3

(-3)^2

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

Of course! I forgot about that rule.

Thanks, man.

#4

No worries

#5

I would've answered, but Jamie did.

Oh well.

Oh well.

#6

If only I decided to post that in every thread I would have otherwise not posted in...I would've answered, but Jamie did.

Oh well.

(Excluding the Jamie part...)

#7

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

(Excluding the Jamie part...)

#8

yeh, dam jamie stole my answer.... eh

#9

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 2and-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.

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.

*Last edited by Sol9989 at Oct 4, 2007,*

#11

they should both be +9 shouldn't they?

nvm im wrong.

nvm im wrong.

*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

(-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

*Last edited by Washburnd Fretz at Oct 4, 2007,*