\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
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For the equation \(x^2+x = 0\), the set of solutions is
\(S=\{-1,0,1\}\)
\(S=\{1\}\)
\(S=\{0\}\)
\(S=\{0,-1\}\)
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