The discriminant of a quadratic equation is negative. one solution is 3+4i. what is the other solution?

Sum is 17 and their difference is 3

Ineed with math stuff it involves graphs

Solve the problem by making up an equation. a man could arrive on time for an appointment if he drove the car at 40 mph; however, since he left the house 15 minutes late, he drove the car at 50 mph and arrive 3 minutes early for the appointment. how far from his house was his appointment?