1967 - Montreal, Canada - Expo '67, (Universal and International Exhibition of 1967) the most successful Fair ever, drawing more than 50 million visitors.
... + \left( \frac{b}{a} \right) x + \frac{c}{a}=0
</math>
which is equivalent to
<math>x^2+\frac{b}{a}x=-\frac{c}{a}.</math>
The equation is now in ...