When u take the cubic root of 8 the answer will be 2. which means in this case, you have only one possible answer. However, taking in account the following example.

![\sqrt[3]{x^3} =\sqrt[3][8]](https://img.qammunity.org/2019/formulas/mathematics/middle-school/hqude9c46mq4rj8t036r28tsv52p4ddlp0.png)

which means there are 3 answers for x but all lies at the same point.
I hope this answer helps you to figure out what u r looking for ;)