Respuesta :

[tex]\sqrt[]{9x^4}[/tex]

Let's use the following properties:

[tex]\begin{gathered} \sqrt[]{a\cdot b}=\sqrt[]{a}\cdot\sqrt[]{b} \\ \sqrt[z]{x^y}=x^{\frac{y}{z}}^{} \end{gathered}[/tex]

so:

[tex]\sqrt[]{9x^4}=\sqrt[]{9}\cdot\sqrt[]{x^4}=3\cdot x^{\frac{4}{2}}=3x^2[/tex]