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

Complex numbers - basic introduction

Introduction to complex numbers | Imaginary and complex numbers | Algebra II | Khan Academy

Polar vortex could bring wild weather pattern

Take the Polar Bear Plunge! 🐻‍❄️ | Mission Animal Rescue | Nat Geo Kids

Things Are Weird At The North Pole

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

Complex Number Operations