Australia:
Belgium:
Canada:
Czech Republic:
Finland:
France:
Germany:
Hong Kong:
Japan:
Netherlands:
New Zealand:
Portugal:
Puerto Rico:
Sweden:
Switzerland:
United Kingdom:
United States:
... the method of completing the square[?]. <math>ax^2+bx+c=0</math> Dividing our quadratic equation by a, we have <math> x^2 + \left( \frac{b}{a} ...