Australia
Austria
Belgium
Brazil
Canada
Chile
Denmark
Finland
France
Germany
Hong Kong
Italy BCI[?]
Japan
Netherlands
Spain
Sweden
Switzerland
Taiwan, ROC
United Kingdom
United States
International
... solutions are also called the roots of the equation. The formula reads <math> x=\frac{-b \pm \sqrt {b^2-4ac}}{2a} </math> The term b2 – 4ac is ...