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Math Help - Help! Cubic equation

  1. #1
    Junior Member
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    Help! Cubic equation

    Hi,

    0 = 2t^3 + 5t^2 - 84

    t>0

    i dont know how to use the cubic equation,

    thanks

    Moon
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by Moon Hoplite View Post
    Hi,

    0 = 2t^3 + 5t^2 - 84

    t>0

    i dont know how to use the cubic equation,

    thanks

    Moon
    You will probably have to do this numerically, Newton Raphson should find a positive root, and a bit of further checking will show that it has no other roots.

    CB
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