1. The problem statement, all variables and given/known data Three charges q1=+2Q q2=-2Q q3=-4Q. are each a distance d from the origin. What is the magnitude and direction of the electric field at the origin. I'm getting confused by not having d specified as a number. 2. Relevant equations E = Σ kq/r2 3. The attempt at a solution I've determined the magnitudes of the three E vectors for each charge. I know I cannot algebraically sum them and that I have to use sin/cos to get their components however I dont know where to begin. Thank you so much for your help!!