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  9. Q224

RRB Group D (Level-1 posts) 2022 · Question 224 of 598

The sum of the roots of the quadratic equation 4x2 + 7x - 21 = 0 is:

  1. A21/4
  2. B7/4
  3. C-7/4Correct
  4. D-21/4

Answer: C. -7/4

Explanation

For the equation 4x2 + 7x - 21 = 0, the sum of the roots is -b/a = -7/4.

Source: RRB Group D 2022 Prev. Yr. Paper (17 Aug 2022) (Shift 3) - Prepp · reliable-secondary

← Q223View full paper (598 questions)Q225 →

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