### Home > A2C > Chapter 11 > Lesson 11.1.1 > Problem11-7

11-7.

For the function $f(x) = 5x^2 + 4x + 20$, find the roots and the vertex of the graph. Then rewrite the equation in graphing form.

Find the roots by using the Quadratic Formula.
Factor and complete the square OR average the intercepts and use substitution to find the vertex.