Macmillan Learning Attempt 1 Charge q = -q is located at position (0, d). Charge q2 = -3q1 is located at position (d, 0). Charge 3 = = 3q1 is located at position (2d, 2d). d d 9 d d X Determine the net electric field Enet at the origin in terms of the given quantities and physical constants, including the permittivity of free space Eo. Express the electric field using ij unit vector notation. Enter precise fractions and roots rather than entering their approximate numerical values.