### Home > CCA > Chapter 9 > Lesson 9.4.3 > Problem 9-117

9-117.

Solve the quadratic equation below *twice*, once using the Quadratic Formula and once by completing the square. Which was easier?** **Homework Help ✎

*x*^{2} − 10*x* + 21 = −4

Follow the steps in the Math Notes box.