Alfred, Duke of Saxe-Coburg-Gotha[?], (1844-1900), later Duke of Edinburgh and Duke of Saxe-Coburg and Gotha, second son of [[Victoria of the United Ki
... roots of the equation. The formula reads
<math>
x=\frac{-b \pm \sqrt {b^2-4ac}}{2a}
</math>
The term b2 – 4ac is called the discriminant of the ...