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

0

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4

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- 2

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None of these

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Solution

The correct option is D $0$
$n^{2} + 4 n = 0 n (n + 4) = 0 n = 0, n = - 4$
From the given options, $n = 0$ is right.
Hence option A.

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