\[f(x) = \sqrt[3]{x}\]
\[f\left( (x - 1)^{2} \right) + 5f(x - 1) + 6 = 0\]
\[\sqrt[3]{(x - 1)^{2}} + 5\sqrt[3]{x - 1} + 6 = 0;\ \]
\[\ t = \sqrt[3]{x - 1}\]
\[t^{2} + 5t + 6 = 0\]
\[D = 25 - 24 = 1\]
\[t_{1},_{2} = \frac{- 5 \pm 1}{2} = - 2;\ - 3\]
\[\left( \sqrt[3]{x - 1} \right)^{3} = ( - 2)^{3}\text{\ \ \ \ \ \ \ \ \ \ }\]
\[x - 1 = - 8\]
\[x = - 7\]
\[\left( \sqrt[3]{x1} \right)^{3} = ( - 3)^{3}\]
\[x - 1 = - 27\]
\[x = - 26\]
\[Ответ:( - 7)\ и\ \ ( - 26).\]