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Homework Help: Sqr root of (x-4)^2 + y^2, what do we use this for?

  1. Jan 18, 2006 #1
    does anybody knows what does the eqn such as sqr root of (x-4)^2 + y^2 use to find for??

    pls help.....
  2. jcsd
  3. Jan 18, 2006 #2
    hmmm... the distance from the dot (4,0)?
  4. Jan 18, 2006 #3
    oh...ya....thanx very much
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