Vingåker is a municipality in central Sweden, in the county of Södermanland. The municipality covers an area of 370.1 km². Of the total population of 9186, 4610 are male, and 4576 are female. The population density of the community is 25 inhabitants per km².
... 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 ...