Marc Feld (born May 8, 1947), better known as Marc Bolan, was the lead singer and songwriter with the band Tyrannosaurus Rex and later T. Rex from 1967 until his death in a car crash in 1977. He is credited by many as having invented glam rock, although fans of David Bowie may disagree.
... 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. (Geometrically, this means ...