Find the roots of the equation $z^{2}+9=0$

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godwin_ibrahimTyro

Asked: November 18, 20202020-11-18T20:26:05+00:00 2020-11-18T20:26:05+00:00In: Algebra

Find the roots of the equation $z^{2}+9=0$

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Find the roots of the equation $z^{2}+9=0$

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Sengemegz · Accepted Answer · 2020-12-16T12:42:55+00:00

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Sengemegz Moderator

2020-12-16T12:42:55+00:00Added an answer on December 16, 2020 at 12:42 pm

$z^{2}+9=0$
subtract 9 from both sides
$\Rightarrow z^{2}=9$
square root both sides
$\Rightarrow z=\pm \sqrt{9}$
$\Rightarrow z=\pm 3$
$\Rightarrow$ either $z=3$ or $z=-3$

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