y'''+y''+y'+y=x^2

thanks

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- Dec 28th 2010, 08:45 PMceodesolve
y'''+y''+y'+y=x^2

thanks - Dec 29th 2010, 12:52 AMFernandoRevilla
The roots of the characteristic equation are , so the general solution for the homogeneus is:

A particular solution for the complete has the form :

Try it.

Fernando Revilla