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Math Help - Algebra!!!!!!!!!!

  1. #1
    Newbie
    Joined
    Sep 2008
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    5

    Algebra!!!!!!!!!!

    Hey! I'm back again! It seems so simple!

    How can I do this:::




    See you!!!
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  2. #2
    Super Member
    Joined
    Jun 2008
    Posts
    792
    Note that 4^{x} + 4^{-x} = 2^{2x} + 2^{-2x}

    And we know that 2^{x} + 2^{-x} = 3. By squaring both sides we get:

    2^{2x} + 2(2^{0}) + 2^{-2x} = 9
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  3. #3
    Newbie
    Joined
    Sep 2008
    Posts
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    thanx

    Yeah! That's it!

    Thank you so much!!! It Helps me a lot!!!
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