1987 - They had released their demo EP of the complete full-length demos of 1986.
1988 - Joe Sirois[?] leaves college and joins the band and he was 22-years old.
1989 - They had released and their demo EP of the complete full-length demos of 1988 and 1989 and then the full-length album Devil's Night Out[?] in the US.
... the common denominator is 4a2. We get
<math>\left(x+\frac{b}{2a}\right)^2=\frac{-4ac+b^2}{4a^2}=\frac{b^2-4ac}{4a^2}.</math>
Taking square roots of ...