Multiple choice

Root of the quadratic equation $n^{2}\,+\,4n\,=\,0$ is

  1. $0$
  2. $4$
  3. $-2$

  4. None of these
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A Correct answer
Explanation

n^2 + 4n = 0 => n(n + 4) = 0. Roots are n = 0 and n = -4.

AI explanation

Factoring the quadratic equation n^2 + 4n = 0 gives n(n + 4) = 0. Setting each factor to zero yields n = 0 or n = -4. Since 0 is listed among the choices, the result is 0.

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