Legacy digital computing relies on two bits, 0 & 1. A thing can be exist or not, the answer of a question can be yes or no… No other possibility.

With quantum computing, there’s a possibility emerges: the answer can be both yes or no, at the same time! (look at Schrödinger’s cat). So, computing possibilites can be quantify as the powers of 3, rather than 2.

Idk if this is enough but I tried my chances.