4.3.1 Linear ode with constant coefficients \(Ay^{\prime \prime }+By^{\prime }+Cy=f\left ( x\right ) \)

4.3.1.1 Quadrature ode \(y^{\prime \prime }=f\left ( x\right ) \)
4.3.1.2 Solved by finding roots of characteristic equation
4.3.1.3 Solved using Laplace transform
4.3.1.4 Solved using series method