JK-- Political institutions and public administration - United States
JL-- Political institutions and public administration - Canada, West Indies, Mexico, Central and South America
JN-- Political institutions and public administration - Europe
JQ-- Political institutions and public administration - Asia, Arab countries, Islamic countries, Africa, Atlantic Ocean Islands, Australia, New Zealand, Pacific Ocean Islands
... + \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 ...