A solution to a homogeneous system

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SUMMARY

The discussion centers on solving the differential equation \( \frac{3}{2}f(x) - \frac{x}{2}f'(x) - f''(x) = x \). The user attempted various polynomial solutions of degrees 1, 2, and 3 but found them ineffective. A suggestion was made to explore the "Method of Variation of Parameters" as a potential approach to finding a solution.

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Homework Statement



I know there is a polynomial that is a solution to the equation:

3/2f(x) - x/2f'(x) - f''(x)=x



Homework Equations





The Attempt at a Solution


I tried many polynomials of degrees 1,2 and 3, but they do not work in my equation
 
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What happens when you back-substitute f(x)=x?
 
I think you want http://en.wikipedia.org/wiki/Method_of_variation_of_parameters" for this problem.
 
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