||'''Book'''|| Advanced Engineering Mathematics ||
 ||'''Author'''|| Erwin Kreyszig ||
 ||'''Edition'''|| 8th Edition ||

/* code_begins */

{{{
x=var('x')
y=function('y',x)
de=9*diff(y,x,2)+6*diff(y,x,1)+y==0
desolve(de,y)
}}}

/* code_ends */

 * '''Solution by''': 
   * Kishor B Patil,Lecturer,SIGCOE kOPERKHAIRANE Navi-Mumbai.