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A +2.00 nC point charge is at the origin, and a second -5.00 nC point charge...

A +2.00 nC point charge is at the origin, and a second -5.00 nC point charge is on the x-axis at x = 0.800 m. Find the magnitude and direction of the electric field at each of the following points: x = 0.200 m, 1.20 m, -0.200 m. I don't understand how to find the direction of the electric field -- please fully and clearly explain that part!

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