A van de Graaff generator accelerates electrons so that they have energies equivalent to that attained by falling through a potential difference if 150mV

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)

a is the best answer your welcome