watch the " ow to Derive the Quadratic Formula" b Vbz 4ac x = i 2:: 20. Directions Think about this formula and answer the following questions. 1. This formula allows us to nd the roots (zeros) of a quadratic function. Explain how you know the roots are always symmetric around the xcoordinate of the vertex. 2. Using this last idea, if a function has the roots of x=4 and x=12, what is the xcoordinate of it's vertex? 3. How does the discriminant relate to this idea? 4. Lastly, though it is not relevant to graphing, prove that the two roots, X1 + X 2 = T . It might be best if you work this out on paper and attach a picture of this part to your post