Solve : $9 y^{2} + 5 = 0$

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Solution

$9 y^{2} + 5 = 0$

$\Rightarrow 9 y^{2} = - 5$

$\Rightarrow y^{2} = \frac{- 5}{9}$

$\Rightarrow y = \pm \sqrt{\frac{- 5}{9}}$

$\Rightarrow y = \pm i \frac{\sqrt{5}}{3}$

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