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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

    micromass

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    Remember that

    [tex]x^2=y^2[/tex]

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

    Here

    [tex](4-9/2)^2=(5-9/2)^2[/tex]

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

    mathman

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