Fergus I of Dalriada, also known as Fergus mor. Fergus I was king of Dalriada. He reigned from about 500-501. He is sometimes considered the father of Scotland.
... formula reads
<math>
x=\frac{-b \pm \sqrt {b^2-4ac}}{2a}
</math>
The term b2 – 4ac is called the discriminant of the quadratic equation, because it ...