\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
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For the equation \(x^2 = -2\), the set of solutions is
\(S=\{-2,2\}\)
\(S=\{2\}\)
\(S=\{\}\)
\(S=\{-\sqrt{2},\sqrt{2}\}\)
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