Question

Write 13 as a complex number.​
Help please I can't remember how to do complex numbers ~

Answer 1

All complex numbers come in two parts: the real and the imaginary ones. That's why we can write all complex numbers as

`a+bi`

where
`a` is the real coefficient, and
`b` is the imaginary coefficient.

In particular, you can see that, if you set
`b=0`, you have the usual real numbers again. For example, choose
`a=5` and
`b=0` to get

`5+0i=5`

So, real numbers are actually already complex numbers, just like you can think of integers as fraction, where

`5=(5)/(1)`