1. HW Warm-Up Evaluate the expression

2. HW Lesson 9.1: Solving Quadratic Equations by Finding Square Roots Algebra I

3. HW Definitions Square Root: The square root of a number is one of its two equal factors.   The square root is the INVERSE OPERATION for squaring a number.

4. HW Finding Square Roots Every positive number has a positive square root and a negative square root. However, negative numbers like -9 have no real square root because the square of a number cannot be negative.  EXAMPLES:

5. HW Examples

6. HW Check Your Progress

7. HW Solving Quadratic Equations A Quadratic Equation is an equation that can be written in the following STANDARD FORM: , where.

8. HW Examples Evaluate for the given values

9. HW Check Your Progress Evaluate for the given values

10. HW When, this equation becomes. To solve quadratic equations of this form, isolate the term. To get by itself, compute the inverse operation of, which is the square root of the number.

11. HW Examples

12. HW Check Your Progress

13. HW Classwork Pg. 507 #8-18 (all)

14. HW Homework Pg. 507 – #23-75 (Every Other Odd)