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x2 = 84

x = ?

 Jun 20, 2022
 #1
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\(x=\sqrt{84}\)
\(\text{which also equals }\)

\(x=2\sqrt{21}\)

.
 Jun 20, 2022
 #2
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You are missing the case where \(x=-\sqrt{84}\), so the answer would actually be \(\boxed{x=\pm2\sqrt{21}}\).

RainbowSquirrel53  Jun 20, 2022

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