As a general rule, the use of cubes and higher powers should be avoided
whenever possible. Thus, in the foregoing section, we recommend treating
an expression of the form _a_√(_b_^3) as _a_ × _b_ × √_̅b_; the
magnitudes of the values thus met with are more easily appreciated by
the beginner, and mistakes in estimating the large numbers involved in
cubing are avoided.