Use the Rational Root Theorem to determine which one of the following is NOT a root of 3x3 - kx2 - 16x + 12 =0?

  • Use the Rational Root Theorem to determine which one of the following is NOT a root of 3x3 - kx2 - 16x + 12 = 0


  • The rational root theorem is when you put p's over q's. the factors of the constant (in this case, 12) are p's, and the factors of the leading coefficient (in this case, 3) are the q's.

    Possible p's: 1, 2, 3, 4, 6, 12
    Possible q's: 1, 3

    Therefore, the possible rational roots of the equation are: (all answers are plus or minus!!!!!!!) 1, (1/3), 2, (2/3), 3, (3/3), 4, (4/3), 6, (6/3), 12, (12/3)

    Some of these are the same:
    (3/3) = 1, (6/3) = 2, (12/3) = 4

    So your possible rational roots are:
    (+ or minus) (1/3), (2/3), 1, 2, (4/3), 3, 4, 6, 12







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    13 March 2010 | cameltoepants.com | edit