For this case we have the following expression:
[tex]7x ^ {\frac {2} {3}}[/tex]
By definition of properties of powers and roots we have:
[tex]a ^ {\frac {m} {n}} = \sqrt [n] {a ^ m}[/tex]
Then, we can rewrite the expression as:
[tex]7x ^ {\frac {2} {3}} = 7 \sqrt [3] {x ^ 2}[/tex]
Answer:
The expression is equivalent to:
[tex]7 \sqrt [3] {x ^ 2}[/tex]
