engineering mathematics MCQ #4281

For what value of k, the equation x² + kx + 4 = 0 has equal roots?

engineering mathematics MCQ #4281

  1. Question 1

    Q1. For what value of k, the equation x² + kx + 4 = 0 has equal roots?

    • A) 4
    • B) -4
    • C) ±4
    • D) 2

    Answer: ±4

    Explanation: For equal roots, the discriminant b² - 4ac = 0. So, k² - 4*1*4 = 0, hence k = ±4.