9225 424 1 Imaginary Numbers are Real - Part 1: Introduction 9225 424 1 Math Imaginary Numbers are Real
8121 259 0 Imaginary Numbers are Real - Part 2: A Little History 8121 259 0 Math Imaginary Numbers are Real
8297 144 0 Imaginary Numbers are Real - Part 3: Cardan's Problem 8297 144 0 Math Imaginary Numbers are Real
