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  4. Solve x2 + 2 = 0

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Q. Solve $x^{2} + 2 = 0$

Complex Numbers and Quadratic Equations

Solution:

We have, $x^{2}+2=0$
$\Rightarrow x^{2}=-2$
$x=\pm\sqrt{-2}$
$=\pm\sqrt{2}\,i$