Stephen Stills (January 3, 1945 -) is an American-born musician who played with Buffalo Springfield and Crosby, Stills, Nash and Young. Throughout his career, Stills has released a number of solo albums. His solo album Stills Alone features Stills' distinctive guitar style and singing.
... we get
<math>x=\frac{-b}{2a}\pm\frac{\sqrt{b^2-4ac}}{2a}=\frac{-b\pm\sqrt{b^2-4ac}}{2a}.</math>
Generalizations
The formula and its proof remain ...