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