Bibliography: The Boats of the Glenn Carrig[?] Carnacki, the Ghost Finder[?] The Ghost Pirates[?] The House on the Borderland[?] The Night Land[?]
... of b/(2a) to both sides, getting <math>x^2+\frac{b}{a}x+\frac{b^2}{4a^2}=-\frac{c}{a}+\frac{b^2}{4a^2}.</math> The left side is now a perfect square; it ...