King Mongkut (Rama IV), (October 18, 1804 - October 18, 1868) was a king of Thailand1851-1868. He died from malaria. Reportedly, he remarked to one of his Christian missionary friends 'What you teach us to do is admirable, but what you teach us to believe is foolish'.
... by the quadratic equation touches the x-axis in a single point.)
If the discriminant is positive, then there are two different solutions x, both of which are real. ...