Both −6 and 6 make the equation x22=18 true. Use set notation to express these solutions. When entering your response, list elements in the set from least to greatest, with a comma between each element in the set

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The solutions to the equation \( x^2 = 18 \) are \( -6 \) and \( 6 \). In set notation, these solutions can be expressed as:

\[ {-6, 6} \]

This notation lists the elements in the set from least to greatest and separates them with a comma.