Australia
Belgium
Canada
China, mainland (People's Republic of China)
Chile
Denmark
England
Estonia
Finland
France
Germany
Guatemala
Honduras
Hong Kong
Ireland
Israel
Italy (listing taken from http://sito.cineca.it/strutture/struttura)
Japan
Netherlands
New Zealand
Norway
Northern Ireland
The Philippines
Poland
Portugal
Scotland
Singapore
Slovenia
South Africa
Spain
Sweden
Switzerland
United States of America
Wales
International
... 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 square roots of bo ...