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Math Help - Rational Zero Problem

  1. #1
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    Rational Zero Problem

    Can someone help me solve for this problem. . . I have tried using the reational zero theorom but I think I may have done something wrong because none of the possible zeros work and I can't find a solution. Can someone check to see if this problem has a solution?

    Problem: d^3+5d^2+35d-1825=0
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  2. #2
    MHF Contributor
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    Quote Originally Posted by runner940 View Post
    Can someone help me solve for this problem. . . I have tried using the reational zero theorom but I think I may have done something wrong because none of the possible zeros work and I can't find a solution. Can someone check to see if this problem has a solution?

    Problem: d^3+5d^2+35d-1825=0
    Being a cubic, this has to have a solution. But it might not be rational.

    What did you try? What were your results?

    When I checked the graph, it looked like the only real root was between x = 9 and x = 10. At a guess, there may be a typo in the exercise, since they usually intend these things to be neatly solveable.
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