What does the quadratic formula mean? In this video I present a geometric interpretation that shows where the formula comes from.\rbr\rbrBlog post (textimage summary): \rbr\rbrYou can read more about the history of the quadratic formula and its geometric roots from Cornell Mathematics professor David W. Henderson: \rbr\rbrWhile researching this post, I came across a website that offers a visual interpretation of the quadratic formula that helped me design the graphics: \rbr\rbrSpecial thanks to Patrons!\rbrKyle\rbrAlberto Nishikawa\rbrHenry Segerman\rbr\rbrIf you like my videos, you can support me at Patreon: \rbr\rbrConnect on social media. I update each site when I have a new video or blog post, so you can follow me on whichever method is most convenient for you.\rbr\rbrMy Blog: \rbrTwitter: \rbrFacebook: \rbrGoogle+: \rbrPinterest: \rbrTumblr: \rbrInstagram: \rbrPatreon: \rbr\rbrNewsletter (sent about 2 times a year): \rbr\rbrMy Books\rbr\rbrThe Joy of Game Theory shows how you can use math to out-think your competition. (rated 45 stars on 23 reviews) \rbr\rbrThe Irrationality Illusion: How To Make Smart Decisions And Overcome Bias is a handbook that explains the many ways we are biased about decision-making and offers techniques to make smart decisions. (rated 55 stars on 1 review) \rbr\rbrMath Puzzles Volume 1 features classic brain teasers and riddles with complete solutions for problems in counting, geometry, probability, and game theory. Volume 1 is rated 4.55 stars on 11 reviews. \rbr\rbrMath Puzzles Volume 2 is a sequel book with more great problems. \rbr\rbrMath Puzzles Volume 3 is the third in the . \rbr\rbr40 Paradoxes in Logic, Probability, and Game Theory contains thought-provoking and counter-intuitive results. (rated 4.95 stars on 7 reviews) \rbr\rbrThe Best Mental Math Tricks teaches how you can look like a math genius by solving problems in your head (rated 4.75 stars on 3 reviews) \rbr\rbrMultiply Numbers By Drawing Lines This book is a reference guide for my video that has over 1 million views on a geometric method to multiply numbers.