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  9. Q82

RRB Group D (Level-1 posts) 2022 · Question 82 of 598

The roots of the equation ax2 + bx + c = 0 are equal if:

  1. Ab2 = 4acCorrect
  2. Bb2 > 4ac
  3. Cb2 < 4ac
  4. Db = 4ac

Answer: A. b2 = 4ac

Explanation

The condition for a quadratic equation ax2 + bx + c = 0 to have equal roots is that the discriminant should be zero, i.e., b2 = 4ac.

Source: RRB Group D 2022 Prev. Yr. Paper (17 Aug 2022) (Shift 1) - FreshersNow · reliable-secondary

← Q81View full paper (598 questions)Q83 →

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