October 2- Larry Holmes defeats Muhammad Ali by a knockout in round eleven to retain boxing's WBC world Heavyweight title, in what would be Ali's last world title bout.
... a single fraction; the common denominator is 4a2. We get
<math>\left(x+\frac{b}{2a}\right)^2=\frac{-4ac+b^2}{4a^2}=\frac{b^2-4ac}{4a^2}.</math>
Taking ...