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  9. Q10

RRB Group D (Level-1 posts) 2022 · Question 10 of 598

Which is a quadratic equation?

  1. A(x3 - 4x + 5 = 0)
  2. B(p - q)2 - q2 + 2pq - p = -3
  3. Cx - x3 + 3x2 - 5 = 0
  4. D(x + 3)2 = 0Correct

Answer: D. (x + 3)2 = 0

Explanation

The equation (x + 3)2 = 0 represents a quadratic form with degree 2 in variable x.

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

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