Complex numbers
Complex number (defined)
A complex number is a number that is expressed in the form a+bi, where a and b are real numbers and i is the imaginary number. the fundamental theorem of algebra may require a complex number in the equation to make the polynomial equal to zero
![Image](https://stage.geogebra.org/resource/vUtsYqee/KVR2kZ2fONi6phwX/material-vUtsYqee.png)