$$\left. \begin{array} { l } { \frac { ( x - 2 ) ^ { 2 } ( 4 \cdot 3 ) } { 4 } \geq 1 } \end{array} \right.$$
$x\in (-\infty,-\frac{\sqrt{3}}{3}+2]\cup [\frac{\sqrt{3}}{3}+2,\infty)$
