Mix 2 glasses of red wine, one of vinegar, 3 teaspoonful of cullis, a bit of sugar, 1 sliced onion, a little cinnamon, and a laurel-leaf; boil them a quarter of an hour.
see Wikipedia Cookbook
... 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 a form in which we can ...