Struggling In Math, Any Math Wizards :/

[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.

[Bronxman2012]

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

So, we have:

-9 - -27 (-3)

which would be:
-9 - 81

which would be:

-90

[Carth]

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

So, we have:

-9 - -27 (-3)

which would be:
-9 - 81

which would be:

-90

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

2^0 = 0
-3x0 =0

[Gaunab]

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

2^0 = 0
-3x0 =0

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

[Fao]

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

2^0 = 0
-3x0 =0

2^0 (any any other number ^0) = 1 yep any thing to the zero'th power=0, oh and im doing algebra too!

[Fao]

Im on ipod app so cant edit,


Edit* =1 my bad

[CrimsonTider]

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

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.

[OvigorothO]

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

[Redbridge]

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

[Swords]

um: answer is: this is counfusing!! lol

[Gaunab]

LMAO, three different answers so far :P


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


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

9 ~ 243= -234

Bronxman is right.

[CrimsonTider]

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.

[Paar]

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

[Redbridge]

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/index?qid=20081207114553AAmzg3i
http://wiki.answers.com/Q/What_is_minus_3_squared

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

[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

[CrimsonTider]

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


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

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

[Ayc2000]

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

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

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

[Gaunab]

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 :)

[Miner]

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

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.

[Ayc2000]

Mind telling us your version of the answer? :P

@Crim
So how does (-3x2^0) equal -9 ? I stick with -90 as solution :)
He said it was a mistake lol :)

[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 :)

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

[Bronxman2012]

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