Good stuff. Maybe you could mention why they were invented in the first place, also an argand diagram.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.
Looking great! Complex numbers is one of the most fascinating topics for me.
It IS fascinating, and I don't think I have shown that so far
I intend to write more pages one day (and will include argand diagrams!) where I can hopefully show some of the neat aspects ... any suggestions?
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman