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## Homework Statement

What is the magnitude of the electric field at point p due to the four point charges shown? The distance d is between charge centers.

## Homework Equations

Electric Field = kq/d^2

Coulomb's Law = k(q1q2)/d^2

## The Attempt at a Solution

I don't know how to go about solving this for a multiple of reasons. First of all, the formation is really throwing me off. I think both the positive and negative 5 charges cancel out, but I'm not too sure how to calculate the forces on p due to the +3.0 and -12