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Homework Help: Easy Calculation

  1. Sep 26, 2006 #1
    How does sqrt(x)*sqrt(4-x^2) equal sqrt*(4x-x ^3)?

    Thanks.
     
  2. jcsd
  3. Sep 26, 2006 #2
    [tex]\sqrt{a}\sqrt{b} = \sqrt{ab}[/tex]
     
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