The Grammy award for Best Female Rock Vocal Performance has been awarded since 1980. Years reflect the year in which the Grammy Awards were handed out, for music released in the previous year.
NOTE: In 1988, 1992, and 1994, the Rock category was not differentiated by gender, and the award was entitled Best Solo Rock Vocal Performance.
... x, both of which are real. (Geometrically, this means that the parabola intersects the x-axis in two points.)
If the discriminant is negative, then there are two different ...