Electric Field question: Two charges are located on the x axis: q1 = +6.0 micro-Coloumbs at x1=+4cm, and q2=+6 micro-coloumbs at x2 = -4cm. Two other charges are located on the y-axis: q3 = +3 micro-Coloumbs at y3=+5cm, and q4 = -8 micro coloumbs at y4 = +7cm. Find the net electric field (magnitude and direction) at the origin. What I've tried to do is say E = F/q, and F = Kq1q2 / r^2, therefore E = (kq1q2 / r^2) / q. since q2 = origin, it = 1? and the q1 and q cancel out? So it becomes: E=k/r^2? I'm pretty sure i'm doing it wrong and was wondering if someone could just point me in the right direction? Any help appreciaited, thanks.