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Math Help - roots

  1. #1
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    roots

    What are the root of x^4-8x^2-8x-2? I want precise not with decimals.
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  2. #2
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    Quote Originally Posted by peteryellow View Post

    What are the root of x^4-8x^2-8x-2? I want precise not with decimals.
    x^4-8x^2-8x-2=x^4-2(2x+1)^2=(x^2-2\sqrt{2}x - \sqrt{2})(x^2+2\sqrt{2}x + \sqrt{2}).
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  3. #3
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    And you can use the quadratic formula to find zeros of those two quadratic factors.
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  4. #4
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    You'll be lucky becuase I get:

    3.2620
    -2.1796
    -0.6488
    -0.4335

    as your roots



    Oops I take that back...........(didnt read the already posted replies duhhh)
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