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This is not a homework question. It is a question that I can't figure out!

  1. Aug 23, 2011 #1
  2. jcsd
  3. Aug 23, 2011 #2
    Remember that


    doesn't mean that x=y. (indeed, we can have x=-y as well).



    doesn't mean that we can leave off the squares.
  4. Aug 23, 2011 #3


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    Science Advisor

    To simplify (-1/2)2 = (1/2)2
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