[Honorary Serb]

Yes, they are not “real numbers”—in a technical sense.

However, the use of imaginary and complex numbers is consequential for certain real-world problems—as in engineering and physics. MIT and others teach about them.

So the “Science March” and Bill Nye lose again!!!!

[Cboldt]

I was exposed to complex numbers in high school, and still use them from time to time.

Complex math (i.e., imaginary+real) isn't the only way to solve the problems, but it is highly convenient, and highly useful.

At any rate, I was being pedantic. Imaginary numbers are not real numbers, and real numbers are not imaginary numbers, in the vernacular. In the complex plane, the X axis is not the Y axis.