1. Special Problems (Solve)
1.) x2 - 4 = 0
2.) 4x2 - 9 = 0
3.) x = 0
4.) 9x = 0
The difference of 2 perfect squares

2. Special Problems (Solve)
1.) x2 - 4 = 0
(x - 2)(x + 2) = 0
x - 2 = 0 & x + 2 = 0
x = & x = -2

3. Special Problems (Solve)
2.) 4x2 - 9 = 0
(2x - 3)(2x + 3) = 0
2x - 3 = 0 & 2x + 3 = 0
2x = & 2x = -3
x = 3/2 & x = -3/2

4. Special Problems (Solve)
3.) x = 0
4.) 9x = 0
Your Turn

5. Special Problems (Solve)
3.) x = 0
(x - 5)(x + 5) = 0
x - 5 = 0 & x + 5 = 0
x = & x = -5

6. Special Problems (Solve)
4.) 9x = 0
(3x - 10)(3x + 10) = 0
3x - 10 = 0 & 3x + 10 = 0
3x = & 3x = -10
x = 10/3 & x = -10/3

7. Classwork
Do Pg. 176 # 7 – 49
First Column