Precalculus (6th Edition) Blitzer

$3log_5(x)+\frac{1}{2}log_5(y)-3$
Using the logarithmic properties, we have $log_5(\frac{x^2\sqrt y}{125})=log_5(x^3)+log_5(\sqrt y)-log_5(125)=3log_5(x)+\frac{1}{2}log_5(y)-3$