Necessity of complex numbers

Imaginary Numbers Are Real [Part 1: Introduction]

Why are there no 3 dimensional "complex numbers"?

Complex integrals are ... different.

The Argument of a Complex Number

Complex Numbers in Quantum Mechanics

Introduction to Complex Numbers (2 of 2: Why Algebra Requires Complex Numbers)

What is a Complex Number (a + bi) ? Must Know To PASS Algebra

Imaginary Numbers Are Not Imaginary | Jeff O'Connell | TEDxOhloneCollege

Complex numbers

How Imaginary Numbers Were Invented

Complex Analysis L12: Examples of Complex Integrals

Complex numbers and curves | Math History | NJ Wildberger

e^(iπ) in 3.14 minutes, using dynamics | DE5

Complex Numbers : The Argand Diagram : ExamSolutions

Complex Numbers In Polar - De Moivre's Theorem

Varying |z| & Argz on a Locus

Advanced Linear Algebra - Lecture 1.5: Complex Numbers

15 - Complex Numbers & the Complex Plane

Complex numbers: Solving Equations (with example)