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

/* code_begins */

{{{
#Prob 13 - finding a solution to a 2nd order DE with initial conditions
x=var('x')
y=function('y',x)
de=9*diff(y,x,2)+6*diff(y,x)+y==0
desolve(de,y,ics=[0,4,-13/3])
}}}

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 * '''Solution by''': 
   * <Aniket Basu>, <Mathematical Physicist>, <ISI Kolkata>