1. Questions from HW???

2. 2.13 Use Square Roots to Solve Quadratic Equations 2.10-2.13 Test: FRIDAY!!!!

3. Vocabulary  If b 2 = a then b is a square root of a.  All positive real numbers have two square roots A positive square root (or principle square root) and a negative square root. This is written as

4. Vocabulary  A square root is written with the radical symbol  The number or expression inside the radical symbol is the radicand.

5. Vocabulary  The square of an integer is called a perfect square.

6. Example 1:  Solve the equation: x 2 – 7 = 9 z 2 + 13 = 5

7. Example 2:  Solve 9m 2 = 169

8. Example 3:  Solve 2x 2 + 5 = 15

9. Example 4:  Solve 3(x + 3) 2 = 39

10. You Try:  w 2 – 9 = 0  4r 2 – 7 = 9  2(y + 4) 2 = 18

11. Classwork:  P. 121 #2-24 EVENS