One solution each is given for four quadratic equations. Assuming that each quadratic equation has two solutions, what is the second solution for each equation?
1. x = 5 - 4i 2. x = -4 - 5i 3. x = 4 + 5i
a. x = 4 - 5i b. x = 5 + 4i c. x = -5 -4i d. x = -4 + 5i