2nd Order Linear Homogeneous Differential Equations

 

General solutions to

 

The characteristic equation for this differential equation is

 

.  Let the solutions of this quadratic be m1 and m2.

 

We have three cases to consider:

 

  1. Distinct Real Roots: m1 and m2 are real and m1 ≠ m2.  Then the solutions to the differential equation are

 

  1. Equal Real Roots: m1 and m2 are real and m1 = m2.  Then the solutions to the differential equation are

  2. Complex Roots: m1 = A + Bi and m2 = A - Bi.  Then the solutions to the differential equation are