Solve the following equation for $z$:

$$\log(z) + \log(z + 15) = 2$$

$z =$

(Note: Write your answer in exact form using logarithmic and exponential notation if necessary (click here for help writing logarithms or click here for help writing exponents). If there is more than one correct answer, enter your answers as a comma separated list. If the equation has no solution, write "No Solution")