In this lesson, you learned how to:
- Use the radical and "plus-minus" symbols to represent solutions to quadratic equations.
- Explain why the plus-minus symbol is used when solving quadratic equations by finding square roots.
Here are the activities that helped you reach those goals:
- 9.5.1: Roots of Squares
- In this activity, you found the area and side lengths of squares to explore square roots.
- 9.5.2: Solutions Written as Square Roots
- In this activity, you solved quadratic equations that had radicals left in the solutions.
- 9.5.2: Self Check
- 9.5.2: Additional Resources
- 9.5.3: Finding Irrational Solutions by Completing the Square
- In this activity, you solved quadratic equations by completing the square. You graphed the equations to find the approximate solutions using a graphing calculator.
- 9.5.3: Self Check
- 9.5.3: Additional Resources
- 9.5.4: Finding Exact Solutions
- In this activity, you solved quadratic equations and used a calculator to approximate the actual solution(s).
After these activities, you completed the following practice:
- 9.5.5: 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.