Find the positive value of x such that log (x) 64 = 2

Find the positive value of x such that log_x64 = 2
Using the logarithm rules, we know that we can rearrange the given equation into the form:
x² = 64
Knowing this, we square root both sides to get 
x = 8, x= -8
As the value of x must be positive, the solution must be 
x = 8