Struggling In Math, Any Math Wizards :/

Hey Guys, Im having Trouble in math... I feel like an idiot, but Im sad to say It's only Algebra I. I hate to say it but, I got F's on my last few assignments and I feel stupid again asking for help when I need Help, from you my forum friends I mean but, Any Math teacher out there that could help me out? I'd Greatly Appreciate it. I don't want the answers, I just want to understand how to solve them :(

Here a Problem I need help with...


24. -3^2 ~ -3^3 (-3X2^0)

~ = Subtraction Sign.
^ = Exponent.
- = Negative.

-3^2 = -9
-3^3 = -27
(-3X2^0) = -3

So, we have:

-9 - -27 (-3)

which would be:
-9 - 81

which would be:

-90

Quote:

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Originally Posted by Bronxman2012:552032

-3^2 = -9
-3^3 = -27
(-3X2^0) = -3

So, we have:

-9 - -27 (-3)

which would be:
-9 - 81

which would be:

-90

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I may be wrong but doesn't (-3x2^0) = 0?

2^0 = 0
-3x0 =0

Quote:

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Originally Posted by Carth

I may be wrong but doesn't (-3x2^0) = 0?

2^0 = 0
-3x0 =0

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2^0 (any any other number ^0) = 1

Quote:

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Originally Posted by Gaunab

Quote:

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Originally Posted by Carth

I may be wrong but doesn't (-3x2^0) = 0?

2^0 = 0
-3x0 =0

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2^0 (any any other number ^0) = 1

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yep any thing to the zero'th power=0, oh and im doing algebra too!

Im on ipod app so cant edit,


Edit* =1 my bad

Quote:

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Originally Posted by Paar

24. -3^2 ~ -3^3 (-3X2^0)

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9 ~ (-27)(-9)

9 ~ 243= -234

Two tips:

1. Numbers with exponents not confined to parenthises, the symbol (+/-) is not factored til after the number is raised by the exponent.

2. Numbers raided to the ZERO power (2^0) will always equal 1.

The rest of the problem is basic math. Hope this helps bud.

Wow lol...all i have to say :P

Quote:

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Originally Posted by Paar

Hey Guys, Im having Trouble in math... I feel like an idiot, but Im sad to say It's only Algebra I. I hate to say it but, I got F's on my last few assignments and I feel stupid again asking for help when I need Help, from you my forum friends I mean but, Any Math teacher out there that could help me out? I'd Greatly Appreciate it. I don't want the answers, I just want to understand how to solve them :(

Here a Problem I need help with...


24. -3^2 ~ -3^3 (-3X2^0)

~ = Subtraction Sign.
^ = Exponent.
- = Negative.

---

Is this it?


-3^2 = -3 x -3 = 9
-3^3 = -3 x -3 x -3 = -27
-3 x 2^0 = -3 x 1 = -3

So -3^2 ~ -3^3 (-3X2^0) = 9 - (-27 x -3) = 9 - (81) = - 72

EDIT: forgot to add, for an amazing and free maths/science resource check out the khanacademy.com

um: answer is: this is counfusing!! lol

LMAO, three different answers so far :P

Quote:

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Originally Posted by Redbridge

Is this it?


-3^2 = -3 x -3 = 9 This is where you go wrong, since there are no brackets around the 3 it is first taken to the power of 2, the minus stays.
-3^3 = -3 x -3 x -3 = -27
-3 x 2^0 = -3 x 1 = -3

So -3^2 ~ -3^3 (-3X2^0) = 9 - (-27 x -3) = 9 - (81) = - 72

EDIT: forgot to add, for an amazing and free maths/science resource check out the khanacademy.com

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Quote:

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Originally Posted by CrimsonTider

9 ~ (-27)(-9) The 9 ~ (-27) is alright, but where do you get (-9) as factor from? (-3x2^0) = -3x1 = -3

9 ~ 243= -234

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Bronxman is right.

Typo on my part where I got (-9). I just had minor surgeryvand probably shouldn't do math on prescription painkillers.

Bronx is right but my explanation was to help Paar understand "why" instead of just giving the answer.

Wow Guys! Thank You Ive Reviewed ovee the answers and I see where Ive messed up. Thanks Again!

Why would you choose to put brackets round the 3 if there are none there?

Upon further investigation it would seem it isn't clear at all...

-3 squared in my school was always -3 x -3

Check out these though - lol - confusing stuff for kids today, eh?

http://answers.yahoo.com/question/in...7114553AAmzg3i
http://wiki.answers.com/Q/What_is_minus_3_squared

EDIT: post the answer Paar whenyou get it... Good luck

It's 90
Crim, -3x2^0 is not -9, it's -3
Just a little calculation mistake :)

-3^2 is not the same as (-3)^2
Think of it as (-1)(3)^2

Quote:

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Originally Posted by Ayc2000

It's 90
Crim, -3x2^0 is not -9, it's -3
Just a little calculation mistake :)

-3^2 is not the same as (-3)^2
Think of it as (-1)(3)^2

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I love being singled out. Read my edit. Thanks.

BTW... I teach middle school math. ;)

Quote:

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Originally Posted by CrimsonTider

I love being singled out. Read my edit. Thanks.

BTW... I teach middle school math. ;)

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Sorry, your edit was after I posted XD my apologies
The second part was directed to red bridge though

Quote:

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Originally Posted by Paar

Wow Guys! Thank You Ive Reviewed ovee the answers and I see where Ive messed up. Thanks Again!

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Mind telling us your version of the answer? :P

@Crim
So how does (-3x2^0) equal -9 ? I stick with -90 as solution :)

Quote:

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Originally Posted by faoeskekie

yep any thing to the zero'th power=0, oh and im doing algebra too!

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x^0 ≡ 1

We can prove this by x/x = 1 which is the same as (x^1)/(x^1) = 1. Since x^1 is being divided by x^1, we can take away the powers to obtain x^0. We have done nothing but simplified the LHS, the RHS stays the same.

Of course we aren't allowed to let x = 0 or else we'd be dividing by zero to get infinity.

Quote:

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Originally Posted by Gaunab

Mind telling us your version of the answer? :P

@Crim
So how does (-3x2^0) equal -9 ? I stick with -90 as solution :)

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He said it was a mistake lol :)

Quote:

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Originally Posted by Gaunab:552174

Quote:

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Originally Posted by Paar

Wow Guys! Thank You Ive Reviewed ovee the answers and I see where Ive messed up. Thanks Again!

---

Mind telling us your version of the answer? :P

@Crim
So how does (-3x2^0) equal -9 ? I stick with -90 as solution :)

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Ill post it in a few on the road now. Be home soon and Ill post a pic of my math.

The answer is -90. Trust The Bronxman on this one.