\(6 - \sqrt {3{x^2} - x + 6} = x\)
A.\(S = \left\{ {2; - \frac{{15}}{2}} \right\}.\)
B.\(S = \left\{ { - 2; - \frac{{15}}{2}} \right\}.\)
C.\(S = \left\{ { - 2;\frac{{15}}{2}} \right\}.\)
D.\(S = \left\{ {2;\frac{{15}}{2}} \right\}.\)

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