\[\begin{array}{*{20}{l}}
{\left( {2x - {x^2}} \right)\left( {2{x^2} - 3x - 2} \right) = 0}\\
{ \Leftrightarrow \left[ {\begin{array}{*{20}{l}}
{2x - {x^2} = 0}\\
{2{x^2} - 3x - 2 = 0}
\end{array}} \right. \Leftrightarrow \left[ {\begin{array}{*{20}{l}}
{x = 0}\\
{x = 2}\\
{x = 2}\\
{x = - \frac{1}{2}}
\end{array}} \right.}\\
{ \Rightarrow S = \left\{ { - \frac{1}{2};{\kern 1pt} {\kern 1pt} 0\,;{\kern 1pt} {\kern 1pt} 2} \right\}.}
\end{array}\]
