Answer:
[tex]7\sqrt[3]{x^2}[/tex]
Step-by-step explanation:
The rule of exponents that dictates this to be solved is:
[tex]x^{\frac{a}{b}}=\sqrt[b]{x^a}[/tex]
The power of 2/3 is on "x", NOT 7, so we use this property to write it as:
[tex]x^{\frac{a}{b}}=\sqrt[b]{x^a} \\7x^{\frac{2}{3}}=7\sqrt[3]{x^2}[/tex]
third answer choice is right, [tex]7\sqrt[3]{x^2}[/tex]
