#Kreyszig Problem set 2.9 Question 7
var('x')
y=function('y',x)
print desolve(diff(y,x,2)+diff(y,x)-6*y==(-6*x*x*x)+(3*x*x)+(6*x),[y,x])

SageDays/Kreyszig-2.9-7 (last edited 2010-08-11 11:58:16 by belindadcunha)