Complex Numbers Are Used in Electronics to Describe the Current $E$

Multiple Choice

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. Solve the problem using this formula
-Find $E$ , the voltage of a circuit, if $I = ( 9 + 7 i )$ amperes and $R = ( 3 + 7 i )$ ohms.

A) $( 84 - 22 i )$ volts
B) $( 84 + 22 i )$ volts
C) $( - 22 - 84 i )$ volts
D) $( - 22 + 84 i )$ volts