+118673 Dear Will85237,
If you study mathematics long enough you will find out about imaginary numbers.
Imaginary numbers as based on i where $$i= \sqrt{-1}$$
Complex numbers have a real number part and an imaginary number part like 6+5i
There you go, you have learned something new 
+561 Either this is some branch of mathematics that is above me, or this post isn't detailed enough.
Can you give an example of a complex number?
+3146 example:
$${\mathtt{2}}{i}{\mathtt{\,\times\,}}{\mathtt{2}}{i} = -{\mathtt{4}}$$
+118673 Dear Will85237,
If you study mathematics long enough you will find out about imaginary numbers.
Imaginary numbers as based on i where $$i= \sqrt{-1}$$
Complex numbers have a real number part and an imaginary number part like 6+5i
There you go, you have learned something new
