Pages: 1

 

2008-02-29 06:09:51
SteikeTa
Member
+153|6750|Norway/Norwegen/ Norge/Noruega
Look at the problem I have here: https://img147.imageshack.us/img147/8215/namnlsze5.th.jpg


Now, can anyone show me step by step how to  get that answer? I don't remember the rules for such math anymore... If the numbers were the same it would be no problem. Then I would just add up the numbers and their.... potens (?) minus the numbers and their potens (?) under the line.

But when the numbers are different, I'm not sure how to do it. Any ideas?
Would be great if anyone could show me step by step.
2008-02-29 06:29:20
r'Eeee
That's how I roll, BITCH!
+311|6450

Cross multiply? http://www.mathsisfun.com/algebra/cross-multiply.html

Isn't there meant to be a variable though? What are you trying to find out?

Last edited by r'Eeee (2008-02-29 06:30:09)

2008-02-29 06:32:36
SteikeTa
Member
+153|6750|Norway/Norwegen/ Norge/Noruega

r'Eeee wrote:

Cross multiply? http://www.mathsisfun.com/algebra/cross-multiply.html

Isn't there meant to be a variable though? What are you trying to find out?
The answer is 3^2. So I want to find out how I get that answer. The closest I've come so far is: 3^2*2^-2.
2008-02-29 06:33:27
jimmanycricket
EBC Member
+56|6657|Cambridge, England
6^2*18 ^3 = (3*2) ^ 2*( 3* 3*2)^2= 2*3*2*3*3*3*2*3*3*2*3*3*2 = 2^5*3^8

54^2*8 = (2*3*3*3)^2*(2^3) =  2*3*3*3*2*3*3*3*2*2*2 = 2^5*3^6

=>  2^5*3^8/2^5*3^6 = 3^2

Last edited by jimmanycricket (2008-02-29 06:35:53)

2008-02-29 07:55:39
millmax
Wanna fly over Oslo? PM me!
+18|6540|Norway
Here's two different ways to go there:
https://img153.imageshack.us/img153/3167/mathyg9.gif

Last edited by millmax (2008-02-29 07:56:18)

 

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