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