The indicated function y$1($x$)$y$1($x$)$ is a solution of the given differential equation. Use reduction of order to find a second solution y$2($x$)$y$2($x$).$

$49$y$84$y$+36$y$=0$;y$1=$e$6$x$/749$y$84$y$+36$y$=0$;y$1=$e$6$x$/7$

Using the formula for a second solution,

y$2=$y$1($x$)$e$$P$($x$)$dxy$21$dx$,$y$2=$y$1($x$)$e$$P$($x$)$dxy$12$dx$,$

find a second solution to this differential equation.