How to Solve a Nonhomogeneous 2nd Order DE with a Constant Term?

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SUMMARY

The discussion focuses on solving the nonhomogeneous second-order differential equation y'' + 9y = 2x²e^(3x) + 5. The complementary solution is correctly identified as yc = c1cos(3x) + c2sin(3x). To address the constant term "+5" in the nonhomogeneous part, participants suggest incorporating a constant into the particular solution. This approach ensures that the complete solution accounts for both the polynomial and exponential components of the equation.

PREREQUISITES
  • Understanding of second-order differential equations
  • Familiarity with complementary and particular solutions
  • Knowledge of the method of undetermined coefficients
  • Basic concepts of exponential functions and polynomials
NEXT STEPS
  • Study the method of undetermined coefficients for nonhomogeneous equations
  • Learn how to derive particular solutions for polynomial and exponential terms
  • Explore the theory behind complementary solutions in differential equations
  • Practice solving similar nonhomogeneous second-order differential equations
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Students studying differential equations, educators teaching advanced mathematics, and anyone seeking to deepen their understanding of nonhomogeneous differential equations.

Sean77771
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Homework Statement



y'' + 9y = 2x2e3x + 5

Homework Equations



N/A

The Attempt at a Solution



I think the complementary solution yc = c1cos(3x) + c2sin(3x).

If not for that little +5 at the end of the right hand side, I'm pretty sure I could solve it. But I don't know how to include it in my solution.
 
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Try adding a constant to your specific solution.
 

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