Allied & ICAR Exam Bank • ALLIED_1528 MCQ • 1 Mark

Section 8: General Aptitude

Quantitative Aptitude

Subtopic: Numerical Computation

Question Statement:

For what value of $k$ does the quadratic equation $x^2 - kx + 9 = 0$ have equal real roots?

Options:

  • (A) $\pm 6$
  • (B) $\pm 3$
  • (C) $\pm 9$
  • (D) $\pm 18$

Answer Key:

A

Step-by-Step Solution & Explanation

Discriminant $D = k^2 - 4(1)(9) = 0 \implies k^2 = 36 \implies k = \pm 6$.
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