Calculate square roots, cube roots, and nth roots of a positive number.
The square root of a number is a value that, when multiplied by itself, gives the original number.
Example: $\sqrt{25} = 5$ because $5 \times 5 = 25$.
The cube root of a number is a value that, when used as a factor three times (multiplied by itself twice), gives the original number.
Example: $\sqrt[3]{8} = 2$ because $2 \times 2 \times 2 = 8$.
The "n-th root" of a number is the value that, when raised to the power of $n$, equals the number.
For even roots, the number ($x$) must be positive to return a real result.