Respuesta :
[tex]\sqrt[3]{27 x^{18}}\qquad \begin{cases} 27=3\cdot 3\cdot 3\\ \qquad 3^3\\ x^{18}=x^{6\cdot 3}\\ \qquad (x^6)^3 \end{cases}\qquad \implies \begin{array}{llll} \sqrt[3]{3^3 (x^6)^3}\implies \sqrt[3]{(3x^6)^3} \\\\\\ 3x^6 \end{array}[/tex]