[BUG ?] Who can explain to me the CAS options "Use i" and "complex"?

[dg1969]

(04-02-2018 03:25 PM)Arno K Wrote:  First of all, czeros is not the function to use when you solve an equation,

Arno I'm not sure I understand correctly. What is the use of this function czeros ? In what situation should I use it?

I take this thread to ask for some help. I understand that the "Complex" option means that variables can be complex. What is the difference with "Use i"?