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Geometry Radical Numbers

  1. Feb 8, 2006 #1
    Hey everyone,
    My class recently started radical numbers, and I havent a clue on how you simplify them!
    Heres a few of my homework problems. if someone could possibly walk me through how you do them It would be greatly appreciated.

    http://img495.imageshack.us/img495/6903/math0oj.png [Broken]

    Sorry for the bad paint job :)
    Thanks,

    Lou
     
    Last edited by a moderator: May 2, 2017
  2. jcsd
  3. Feb 8, 2006 #2

    JasonRox

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    I'll write you one.

    sqrt(20) = sqrt(4*5) = 2*sqrt(5)

    See what I did? I found perfect scares and are part of the product of the number 20.

    I believe that's what you're doing.
     
  4. Feb 8, 2006 #3

    JasonRox

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    Gold Member

  5. Feb 8, 2006 #4
    ah ok thanks, I understand that part. But what do you do for division, or when you have a number before the square root?
     
  6. Feb 8, 2006 #5
    Thanks for the link. :cool:
     
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