In their successful series of novels, Ellery Queen is not only the name of the author, but also the detective-hero of the stories.
... a single fraction; the common denominator is 4a2. We get <math>\left(x+\frac{b}{2a}\right)^2=\frac{-4ac+b^2}{4a^2}=\frac{b^2-4ac}{4a^2}.</math> Taking ...