The race for 3 year olds is run a distance of 1 1/2 miles, drawing the best horses in Great Britain and France to compete.
Irish Derby winners:
... b/(2a) from both sides, we get <math>x=\frac{-b}{2a}\pm\frac{\sqrt{b^2-4ac}}{2a}=\frac{-b\pm\sqrt{b^2-4ac}}{2a}.</math> ...