(Note to all wikipedins[?] and Wikipedia.com readers: This is a list of famous people from Argentina. If someone needs to be included, feel free to include that person).
... a single fraction; the common denominator is 4a2. We get
<math>\left(x+\frac{b}{2a}\right)^2=\frac{-4ac+b^2}{4a^2}=\frac{b^2-4ac}{4a^2}.</math>
Taking ...