A Brief History of the Letter 'X,' From Algebra to X-Mas to Elon Musk, History

A math historian explores how "x" came to stand in for an unknown quantity

What does the letter 'X' mean? Branding experts weigh in

A Brief History of the Letter 'X,' From Algebra to X-Mas to Elon Musk, History

The Six, Book by Loren Grush, Official Publisher Page

Elon Musk's 11 Children: All About His Kids and Their Mothers

The Mysterious Origins of 'X' in Algebra

X: The Brand, the Generation and Elon Musk - The New York Times

What does the letter 'X' mean? Branding experts weigh in

The risible origin story of Elon Musk's 'X' - New Statesman

Why does tech love the letter X?

Elon Musk's history with the letter X, from SpaceX to Tesla Model X and xAI

How Elon Musk pronounces 'X Æ A-12,' his new son's name - CNET

Is Elon Musk the best engineer at SpaceX and Tesla or are there others beyond him? - Quora

Why Elon Musk Is Obsessed With The Letter X And Has Been For More Than 20 Years