In Greek mythology, Themis ("law") (Roman equivalent: Justitia) was the personification of divine order, law and custom. She built the Oracle at Delphi and was herself oracular. With Zeus, she was the mother of the Horae, Moirae, Dike and Astraea.
Themis was usually portrayed as a harsh-looking woman, blindfolded and holding scales and a cornucopia.
... this means that the parabola described by the quadratic equation touches the x-axis in a single point.)
If the discriminant is positive, then there are two ...