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Root thing

  1. Jul 5, 2007 #1
    quick question:

    how does this work- (root)72 = 6(root)2

    and what is this technique called?
  2. jcsd
  3. Jul 5, 2007 #2


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    To simplify squareroots one writes the argument as a product, one of which is a square number. So, [itex]\sqrt{72}=\sqrt{36\times 2}=\sqrt{36}\sqrt{2}=6\sqrt{2}[/itex]

    The technique I guess would be called simplifying a square root.
  4. Jul 5, 2007 #3


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    Square roots of integers are often labelled 'surds' in textbooks.
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