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Math Help - Radical Equations #2

  1. #1
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    Post Radical Equations #2



    my attempt: I divide everything by 2 so that I end up with







    I then use quadratics formula and results are:

    The answer is suppose to be n = 4, what did I do wrong?
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  2. #2
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    Re: Radical Equations #2

    Hey Mathnood768.

    Hint: n^2 - 7 = (7-n)^2 not (7-n^2).
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  3. #3
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    Re: Radical Equations #2

    oh, I typed it in wrong, that's what I meant. You end up with with n^2 - 7 = (7-n)^2
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  4. #4
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    Re: Radical Equations #2

    Now try collecting terms and simplifying to get a value of n (use the quadratic formula).
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  5. #5
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    Re: Radical Equations #2

    well u did a basic mistake....

    n^2 term cancels on both sides yielding 14n-56 =0 that is n=4 which is reqd. answer...
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