Recognised musical genres include the following (see the individual genre pages for more information on each genre and the musicial genres page for information about the major groupings):
... to both sides, getting
<math>x^2+\frac{b}{a}x+\frac{b^2}{4a^2}=-\frac{c}{a}+\frac{b^2}{4a^2}.</math>
The left side is now a perfect square; it is the ...