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Thread: multiple roots polynomial

  1. October 27th 2010, 01:42 PM #1
    rlkmg
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    multiple roots polynomial

    5x^3-x+2
    Does this polynomial have multiple roots?
    How would I check if a polynomial has multiple roots or not?
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  2. October 27th 2010, 01:49 PM #2
    Also sprach Zarathustra
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    Only one root... use calculus theorems...
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  3. October 28th 2010, 09:24 AM #3
    TheCoffeeMachine
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    If f(x) = x^3+px+q, then the discriminant \Delta = -4p^3-27q^2.
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