## Precalculus (6th Edition) Blitzer

Fill the blank with: $\displaystyle \frac{-b\pm\sqrt{b^{2}-4ac}}{2a}$
The equation for the quadratic formula is $x=\displaystyle \frac{-b\pm\sqrt{b^{2}-4ac}}{2a}$ You can find it in the text just before example 10.