Two charges, A (-3 C) and B (+4 C), are placed 2.40 m apart. Point X is 30 cm from A, and Point Y is 30 cm from B. What is the electrical potential difference going from X to Y?
W = △Vq
The Attempt at a Solution
Teacher gave answer as 6.9 x 10^4 V
I am not sure whether or not to use electric force or electric potential energy in this problem. I've tried both but obviously I cannot apply it appropriately to get the answer above.