The Gunfight at the O. K. Corral is a legendary event which has been portrayed in numerous Western films. The actual event occurred in a vacant lot near the corral, in Tombstone, Arizona (a corral is like a livery stable[?]; the analogous location in Denver was called the Elephant Corral).
... by the method of completing the square[?].
<math>ax^2+bx+c=0</math>
Dividing our quadratic equation by a, we have
<math>
x^2 + \left( \frac{b}{a} ...