4. Expand

First change the radical to a fractional exponent.

This problem uses the following rules for logarithms

- logb(xy) = logbx + logby
- logbxr = rlogbx
- logb(x/y) = logbx - logby

The first rule that applies to this situation is the last rule listed above.

We can apply the first rule to the first term on the right side of the equation.

Now we can apply the middle rule to all the terms