Before revision: To determine, for a given source voltage and impedance the value of the load impedance for which this expression for the power yields a maximum, one first finds, for each fixed positive value of , the value of the reactive term for which the denominator: is a minimum.
After revision: To determine, for a given source the voltage and the impedance the value of the load impedance for which this expression for the power yields a maximum, one first finds, for each fixed positive value of , the value of the reactive term for which the denominator: is a minimum.