Method of Undetermined Coefficients
www.mathsisfun.com › calculus › differentialMethod of Undetermined Coefficients. This page is about second order differential equations of this type: d 2 y dx 2 + P (x) dy dx + Q (x)y = f (x) where P (x), Q (x) and f (x) are functions of x. Please read Introduction to Second Order Differential Equations first, it shows how to solve the simpler "homogeneous" case where f (x)=0.