general math MCQ #360

If 3 is a solution to the equation 3x² + (k − 1)x + 9 = 0, what is the value of k?

general math MCQ #360

  1. Question 1

    Q1. If 3 is a solution to the equation 3x² + (k − 1)x + 9 = 0, what is the value of k?

    • A) -9
    • B) -11
    • C) -13
    • D) -16

    Answer: -11

    Explanation: Substituting x=3: 3(9)+(k−1)(3)+9 = 0 → 27+3k−3+9 = 0 → k = −11.