Can someone please help me with this question? Two point charges lie on the x axis. A charge of + 3.5 µC is at the origin, and a charge of -3.5 µC is at x = 10.0 cm. What is the net electric field at x = -2.0 cm? What is the net electric field at x = + 2.0 cm? for the first one i did [tex]k q/r^2[/tex] [tex](9 x 10^9) (3.5 x 10^-6)/(0.02m)^2 = 78750000 N/C[/tex] [tex](9 x 10^9) (-3.5 x 10^-6)/(0.12m)^2 = -2187500[/tex] [tex]78750000 - 2187500 = 76562500N/C[/tex] can someone please tell me what i'm doing wrong?