Answer: The square root of 121 is not 12. It is 11.
Explanation:
Given
, remember that:

![\sqrt[n]{x}=x^{(1)/(n)}](https://img.qammunity.org/2020/formulas/mathematics/middle-school/r0cusxq3yatmnt6bkuarb8a7kr4bhfsy9u.png)
As we know, the number 121 can be rewritten in the following form:

Therefore, you need to rewrite this and then simplify. Then, you get:

Then, the square root of 121 is not 12. It is 11.