# Question #55f38

The answer should be $15625 {x}^{12}$, if the problem is written correctly.
${\left(25 {x}^{4}\right)}^{3}$ is not a radical expression, but rather a simple problem involving powers.
To solve, simply apply the third power to the 25 and ${x}^{4}$, noting that when a variable is raised to one power and and then another, the powers are multiplied. Since it is ${\left({x}^{4}\right)}^{3}$, you multiply 4 by 3 to get the power 12.