Sept. 9 (UPI) -- Google is celebrating the start of the 2025-26 school year with a quadratic equation-themed Doodle. The mathematical formula has useful applications across physics, engineering and business. Because the equation can also be employed to explain movement in sports, the artwork shows the word "Google," with the second "g" and the "e" kicking the second "o" -- which is orange and black like a basketball -- back and forth over the "l." Handwritten examples of how the formula may