The sqrt(x) function takes the square root the unit-free portion of x and multiplies it by the unit raised to the power 1/2.

The root(x, n) and root[n](x) functions take the nth root of the unit-free portion of x and multiply it by the unit raised to the power 1/n.

The surd(x, n) function takes the nth root of the unit-free portion of x, whose (complex) argument is closest to the unit-free portion of x, and multiplies it by the unit raised to the power 1/n.

For other properties, see the global functions sqrt, root, and surd.