Préfecture (capital): Tulle[?].
Sous-préfectures: Brive la Gaillarde[?] and Ussel[?].
See also: List of the communes of the Corrèze département
... our quadratic equation by a, we have <math> x^2 + \left( \frac{b}{a} \right) x + \frac{c}{a}=0 </math> which is equivalen ...