Non-Standard AC Power Optimization

An ideal AC voltage source drives a load consisting of a resistor $R$ and an inductive reactance $X$ in series. Let the active power consumed by the load be $P$ , and let the reactive power consumed by the load be $Q$ .

What ratio of $\frac{X}{R}$ maximizes the quantity $(P + Q)$ ?

Note: $R$ and $X$ are both positive numbers with units of ohms.