Answer
$log_{6}(15x+60)$
Work Step by Step
The product property of logarithms tells us that $log_{b}xy=log_{b}x+log_{b}y$ (where x, y, and, b are positive real numbers and $b\ne1$).
Therefore, $log_{6}3+log_{6}(x+4)+log_{6}5= log_{6}(3\times(x+4)\times5)=log_{6}(15x+60)$.
