A positive point charge Q1 = 2.15 × 10-5 C is fixed at the origin of coordinates, and a negative point charge Q2 = -7.15 × 10-6 C is fixed to the x axis at x = +2.00 m. Find the location of the place(s) along the x axis where the electric field due to these two charges is zero. (Enter the locations in order from -x to +x. If there is only one location, enter 0 in the second box.)