In this lesson, you will continue to learn that some solutions to quadratic equations are irrational and can also include expressions that involve a rational number and an irrational number.

When you finish this lesson, you will be able 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 will help you reach those goals:

• 9.5.1: Roots of Squares
• 9.5.2: Solutions Written as Square Roots
  • 9.5.2: Self Check
  • 9.5.2: Additional Resources
• 9.5.3: Finding Irrational Solutions by Completing the Square
  • 9.5.3: Self Check
  • 9.5.3: Additional Resources
• 9.5.4: Finding Exact Solutions

After that, you'll practice and review.

• 9.5.5: Practice
• 9.5.6: Lesson Summary