Two point-like objects carry charges of q1 = +4C and q2 = -3C and are separated by a fixed distance of 50 cm. (a) Determine the point (other than infinity) at which a point-like positive charge will experience zero net electrostatic force due to the two fixed charges. q1 = +4C .......................... q2 = -3C .................... +ve charge .. + <----------.5m----------> - <---------xm---------> + +ve charge has to be closer to the q2 charge but further away from q1. ( positive charge = 1.6*10^-19 C ) So you need to balance forces? let q = positive charge Force q1 on q = -Force q2 on q (4C * q)/(.5 + x)^2 = -(-3C * q)/x^2 Have I set this equation up properly? Any help greatly appreciated, Thanks! EDIT: I figured out my problem. I wasn't using the quadratic formula properly to solve for x. So how do I delete a post?