Charles Louis Alphonse Laveran (1845-1922) (sometimes spelled Alfons or Alfonse), Frenchphysician who discovered that the cause of malaria is a protozoan, the first time that protozoa were shown to be a cause of disease. For this work and later discoveries of protozoan diseases he was awarded the 1907 Nobel Prize for Physiology or Medicine.
... get
<math>x=\frac{-b}{2a}\pm\frac{\sqrt{b^2-4ac}}{2a}=\frac{-b\pm\sqrt{b^2-4ac}}{2a}.</math>
Generalizations
The formula and its proof remain correct ...