40.5 Chapter 9. Equations of first order and higher degree. Supplemetary problems. Page 65

40.5.1 problem 17
40.5.2 problem 18
40.5.3 problem 19
40.5.4 problem 20
40.5.5 problem 21
40.5.6 problem 22
40.5.7 problem 23
40.5.8 problem 24
40.5.9 problem 25
40.5.10 problem 26
40.5.11 problem 27
40.5.12 problem 28
40.5.13 problem 29
40.5.14 problem 30
40.5.15 problem 31