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how do we calculate x^2=9 

and x² = - 5 

 May 18, 2020
 #1
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1)
\(x^2=9\)

\(\sqrt{x^2}=\sqrt{9}\)

\(x=±3\)

2)
\(x^2=-5\)

\(\sqrt{x^2}=\sqrt{-5}\)

\(x=±\sqrt{5}i\)

.
 May 18, 2020

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