\[\begin{array}{l}
{\text{Решите уравнение:}} \hfill \\
\sqrt[3]{{1 + 3x + 3{x^2}}} + \sqrt[3]{{1 + 3x - 3{x^2}}} = 2x. \hfill \\
\end{array}\]
\[\sqrt[3]{{{{\left( {1 + \sqrt[3]{2}} \right)}^3}}} + \sqrt[3]{{{{\left( {\sqrt[3]{2} - 1} \right)}^3}}} = 2\sqrt[3]{2}\]
\[\sqrt[3]{2}\]
