Postmasters General
[1] Since July 1, 1971, the Postmaster General has been appointed by and serves under the Governor of the United States Postal Service[?].
... square roots of both sides yields <math>x+\frac{b}{2a}=\frac{\pm\sqrt{b^2-4ac}}{2a}.</math> Subtracting b/(2a) from both sides, w ...