In simplest form …..

Answer:
2[tex]\sqrt[3]{2}[/tex]
Step-by-step explanation:
[tex]\sqrt[3]{54} - \sqrt[3]{2}[/tex]
[tex]\sqrt[3]{2 * 3 * 3 * 3}[/tex] - [tex]\sqrt[3]{2}[/tex] Prime factorization.
[tex]3\sqrt[3]{2}[/tex] - [tex]\sqrt[3]{2}[/tex] Simplify the radical.
2[tex]\sqrt[3]{2}[/tex] Subtract.