$$\left. \begin{array} { l } { ( x - 2 ) \cdot 3 x \cdot x - 2 x + 4 x = 6 \cdot x = 6 \cdot x + 8 x + 1 } \end{array} \right.$$
$x=-\frac{\sqrt{21}}{3}+1\approx -0.527525232$
$x=0$
$x=\frac{\sqrt{21}}{3}+1\approx 2.527525232$
