Answer:
1,215 Superscript one-fifth x
Explanation:
Given:
The expression to simplify is given as:
![(\sqrt[5]{1215})^x](https://img.qammunity.org/2021/formulas/mathematics/middle-school/5zepgw9k3y3n0n7r23bs981ajmy40wwz4d.png)
We know that,
![\sqrt[n]{a} = a^{(1)/(n)}](https://img.qammunity.org/2021/formulas/mathematics/middle-school/o90orgwoas5dbwlr7xhjlfp6dwhtrsz7lo.png)
Here,

So,
![\sqrt[5]{1215} = 1215^{(1)/(5)}](https://img.qammunity.org/2021/formulas/mathematics/middle-school/rdo9wkhyg1a9qj42oizwxnyhgvtlpck7yr.png)
So, the above expression becomes:
Now, using the law of indices

Here,

So, the expression is finally simplified to;

Therefore, the second option is the correct one.
= 1,215 Superscript one-fifth x