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):
... 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 square roots of ...