Basic Mathematics by Serge Lang - 3.2 Real numbers: Positivity (Basic Mathematics)

Rather than do boring stuff with addition and multiplication, let's look at a curious property of real numbers that are positive. You can tell a number is negative or positive just by how it behaves. We also dive deep into square roots, uncovering a very fascinating relationship between two square numbers that are equal. Support Real Physics by buying the book through this Amazon affiliate link: https://amzn.to/2I5yIHr Here's my Patreon account if you want to give me money: https://www.patreon.com/realphysics Other ways to support Real Physics: https://youtu.be/44nldGgJCiw Playlist: https://www.youtube.com/playlist?list=PLMcpDl1Pr-viA25VUkHNmcUkWx9usPgyb Thank you!