Find the equilibrium points (real and imaginary parts, to 3 decimal places) if unit positive line charges are placed at a+ic, b+id, and -3-2i. Designate one of these numbers as "m17 + im18", and the other as "m19 + im20". If there is only one equilibrium point, let it be "m17 + im18" and let "m19 + im20" equal "m17 + im18".