You may want to review roots and the laws of exponents first.

You can also take a root of an expression with variables. Since
roots are the opposite of exponents, they follow the same rules,
so √(4*x*^{6}) =
√4√*x*^{6}. The rule for taking a root
of a number raised to a power is
that ^{n}√*x*^{m}
= *x*^{m/n}, so
√4√*x*^{6} = 2*x*^{3}, so
that's our answer. (Remember that √
means ^{2}√.)