In this lesson, you learned how to:
- Explain the steps and complete some missing steps for deriving the quadratic formula.
- Explain how the quadratic formula is related to the process of completing the square for a quadratic equation .
Here are the activities that helped you reach those goals:
- 9.8.1: Deriving the Quadratic Formula, Part 1
- In this activity, you learned how to derive the quadratic formula by completing the square for a quadratic equation without evaluating some of the numerical expressions along the way.
- 9.8.1: Self Check
- 9.8.1: Additional Resources
- 9.8.2: Deriving the Quadratic Formula, Part 2
- In this activity, you studied a series of steps to solve by completing the square and making sense of how it leads to the quadratic formula.
- 9.8.2: Self Check
- 9.8.2: Additional Resources
- 9.8.3: Understanding That the Quadratic Formula Is the Combined Steps of Completing the Square
- In this activity, you had to explain parts of a solution for solving an equation by completing the square, where each step was shown, but numerical expressions were not evaluated.
After these activities, you completed the following practice:
- 9.8.4: Practice
Checking In
On a scale of 1 to 5, how confident do you feel about the learning goals of this lesson?
Nice reflection! You learn more when you take the time to reflect on your thinking.