anonymous
  • anonymous
Stupid Question
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
http://img543.imageshack.us/img543/1751/screenshot20120530at947.png
anonymous
  • anonymous
I cant seem to understand this^
anonymous
  • anonymous
which part do you understand up to?

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anonymous
  • anonymous
x= 16 (21
anonymous
  • anonymous
The square root of 336 is 18...
anonymous
  • anonymous
?? anyone lol?
anonymous
  • anonymous
The square root of 336 isn't 18 o-o
anonymous
  • anonymous
!?!??!
anonymous
  • anonymous
18 x 18= 324
anonymous
  • anonymous
18.3
anonymous
  • anonymous
That's if you enter it in your calculator. \[4\sqrt{21}\]is the radical form of it. Also, 18.3 is rounded, so it's less accurate
anonymous
  • anonymous
Do you know how to simplify it so that it turns into the radical form?
anonymous
  • anonymous
No, and I dont have time, Im reviewing for a test tomrrow.
anonymous
  • anonymous
The answer is 18.3 watever right?
anonymous
  • anonymous
They just did the rest to show you a diferent way?
anonymous
  • anonymous
It's actually the standard way...
anonymous
  • anonymous
Have you done this in class?
anonymous
  • anonymous
Yeah like a thousands times.. I was just confused on how they did it in the textbook.
anonymous
  • anonymous
Alright. So we want to divide the number by a perfect square,right? Like when \[\sqrt{18}=\sqrt{9\times2}\]
anonymous
  • anonymous
We know that\[\sqrt{9}=3 \]so the equation turns into \[3\sqrt{2}\], leaving the 2 because it's not a perfect square and it cannot be divided more times to make a perfect square
anonymous
  • anonymous
Ohhh
anonymous
  • anonymous
Do you get it?
anonymous
  • anonymous
yep
anonymous
  • anonymous
Then do \[\sqrt{48}\]

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