The men in this list actually met in the Continental Congress. Especially in later years others were elected but declined to serve or just never attended a meeting.
... 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 both sides ...