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## Homework Statement

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?

## Homework Equations

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.