Tom Lehrer wrote some songs for it: L-Y and Silent E (see http://members.aol.com/quentncree/lehrer/silent-e.htm )
... \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 a form ...