Solve the all parts of given question:
Question: A +8.0nC charge is located at (x,y)=(0cm, 12cm ) and a -3.0nC charge is located (x,y)=( 3.0cm ,0cm).
Question 1: Where would a -8.0nC charge need to be located in order that the electric field at the origin be zero?
Please use as much detail as possible in answer. Thanks.