How do I find the electric field at a point p distance x away from the origin? I guess the y component cancels. I should use the equation E = kq/r2 and add the electric field made by the 3 charges as vectors, but how do I do that? My attempt: r = x/√(x2 + a2) cosθ = x/r Ex = 2kqx/√(x2 + a2)3/2 − kq/x2 Is this correct? I don't really understand the concepts well so if someone can explain that to me it'll be nice.