Complex Numbers: The Basics

Introduction to complex numbers | Imaginary and complex numbers | Precalculus | Khan Academy

Complex numbers - basic introduction

Quadratic Equations in Complex Numbers – Part 2: More Examples

Class 11th Maths | Complex Numbers & Quadratic Equations (Introduction) | Example 1 to 6 | Chapter 4

COMPLEX NUMBERS | How to Add, Subtract, Multiply and Divide Complex Numbers

Complex Numbers: Operations, Complex Conjugates, and the Linear Factorization Theorem