A complex number contains both a real and imaginary part and is written in the form 

. This video explains how complex numbers work with examples.

A complex number contains both a real and imaginary part and is written in the form z = a + ib. This video explains how complex numbers work with examples. 

A complex number, z, is a number that can be written in the form

The imaginary unit i is the principal square root of minus 1

A real number is any value that can be represented on a number line. Examples of real numbers are integers, decimals, fractions, square roots and the number π

Introduction to Complex Numbers

What is a Complex Number?