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Question #684df

1 Answer

Mar 13, 2017

$x = +- 4 i$

Explanation:

$x^2 + 16 = 0$

$x^2 = -16$

$x^2 = 16 * -1$

$x^2 = 16 i^2$ , where $i^2 =-1$

$x = sqrt (16 i^2)$

$x = +- 4 i$

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