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Finding possible and actual rational roots

  1. Apr 24, 2009 #1
    1. The problem statement, all variables and given/known data

    a) 2x^4 - 15x^3 + 23x^2 + 15x - 25 = 0
    b) 12x^3 - 20x^2 + 23x - 10 = 0

    2. Relevant equations

    3. The attempt at a solution

    I was wondering if you guys could check my answers.

    For A:

    Possibles: +/- {1, 5, 25} / {1, 2}
    Actual: 5, 5/2
     
  2. jcsd
  3. Apr 24, 2009 #2
    And for B:

    Possibles: +/- {1, 5, 10} / {1, 2, 3, 4, 6}
    Actual: None
     
  4. Apr 24, 2009 #3

    Mark44

    Staff: Mentor

    Possibles: +/- {1, 2, 5, 10} / {1, 2, 3, 4, 6, 12}
     
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