10. You can't take the square root of a negative number, right? When we were young and still in Algebra I, no numbers that, when multiplied by themselves, gave us a negative answer. Squaring a negative number always gives you a positive. (-1)² = 1. (-2)² = 4 (-3)² = 9

11. So here’s what the math people did: They used the letter “i” to represent the square root of (-1). “i” stands for “imaginary.” So, does really exist?

12. What’s a mathematician’s favorite dessert?

13. Examples of how we use

15. In the near future, we will graph quadratic functions Real SolutionsImaginary Solutions

16. Solving a quadratic using square root functions