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

/* code_begins */

{{{
x = var('x')    
y = function('y',x)   
DE= diff(y,x,2)+(9*y)
desolve(DE,[y,x],ics=[0,4,-2])

}}}

/* code_ends */

 * '''Solution by''': 
   * manoj kumar yadav, engineering, AIT PUNE 
   * manmohan singh, enginering, AIT PUNE