X-Men Who Are Currently On A Leave Of Absense To Hunt Down The Books Of Truth[?]:
Deceased X-Men:
Former Members:
X-Men Allies:
Villains:
... of both sides yields <math>x+\frac{b}{2a}=\frac{\pm\sqrt{b^2-4ac}}{2a}.</math> Subtracting b/(2a) from both sides, w ...