2 Chapter 4.2, Higher order linear differential equations. Constant coefficients. page 180

 2.1 problem 8
 2.2 problem 9
 2.3 problem 10
 2.4 problem 11
 2.5 problem 12
 2.6 problem 13
 2.7 problem 14
 2.8 problem 15
 2.9 problem 16
 2.10 problem 17
 2.11 problem 18