numbrs are divided in real and imaginary, so they can't be together one thing
Complex number are imaginary numbers
in the other hand if you multiply am complex by i than you get a real number, but that is just a way of expressing, so not all numbers are complex.
(5i)²=-25----- a real number is a product of 2 imaginary but it doesn't mean that we can say all are complex
(the explaination is subjectiv, based just in my opinion and knowlige hope it helps)