NOTES:

1. Before solving these ODEs, you MUST show that the ODE is homogeneous.

2. Rule of Thumb for selecting which substitution to try:
   • If the dx term (function M) is simpler than the dy term (function N), use the x = vy substitution (eliminate x).
   • If the dy term (function N) is simpler than the dx term (function M), use the y = ux substitution (eliminate y).

Page 75, problems:

• 1, 3, 4, 5, 7, 11, 12, 13

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