Complex numbers are used in electronics to describe the current in an electric circuit.​ Ohm's law relates the current in a​ circuit, I, in​ amperes, the voltage of the​ circuit, E, in​ volts, and the resistance of the​ circuit, R, in​ ohms, by the formula E=ir . Find​ E, the voltage of a circuit if i=(6-3i) amperes and r=(7+8i)