29.5 Chapter 8, Ordinary differential equations. Section 5. SECOND-ORDER LINEAR EQUATIONSWITH CONSTANT COEFFICIENTS AND ZERO RIGHT-HAND SIDE. page 414

29.5.1 problem 1
29.5.2 problem 2
29.5.3 problem 3
29.5.4 problem 4
29.5.5 problem 5
29.5.6 problem 6
29.5.7 problem 7
29.5.8 problem 8
29.5.9 problem 9
29.5.10 problem 12
29.5.11 problem 19
29.5.12 problem 20
29.5.13 problem 24
29.5.14 problem 25
29.5.15 problem 26
29.5.16 problem 28