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How do you solve $x^{2} = - 9$ $x^2=-9$ ?

1 Answer

Jul 19, 2016

$= pm 3 \ i$

Explanation:

$x^2=-9$
$x= pm sqrt (-9)$
$x= pm sqrt (9 times -1)$
$= pm sqrt (9) sqrt (-1)$
$= pm 3 \ i$

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