Take a look at this image first
If two electrons are each 2.50×10−10 from a proton, as shown in the figure, find the magnitude and of the net electrical force they will exert on the proton.
The Attempt at a Solution
So what I did first was calculate the Electric Force in the x directon
Then took the magnitude of the sum √(x)^2+(y)^2
And thought that would give me the answer for part one, where did I go wrong?