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

11-7.

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

Find the roots by using the Quadratic Formula.

Factor and complete the square OR average the intercepts and use substitution to find the vertex.