1. The problem statement, all variables and given/known data Three point charges are located at the corners of an equilateral triangle with side length a=0.50m 2. Relevant equations 3. The attempt at a solution My question is how can I subtract the vector F2/1? Vectors cant be negative right? I found the magnitude of the vector to be negative. Should I have not included the negative sign for the 4 micro coulomb charge? Then I add the two vectors and that will give me the correct result. My result is correct, but I cant minus vectors so I kind of did it illegally ya? Thanks for your help.