1. Write HW problems on board that you want to go over

2. Define and Use Zero and Negative Exponents
Section 8-3
Define and Use Zero and Negative Exponents

3. Definition of Zero Exponents
● a to the zero power is ALWAYS 1.
Example: a0 = 1 OR 50 = 1
Definition of Zero Exponents
a-n is the reciprocal of an.
Example: a-n = 1 OR 2-1 = 1 an

4. Example 1
Use the definition of zero and negative exponents:
6-2 =
x0 = = 3 =
1 = 62 1 36 1
1 = 07
1 =
Undefined

5. Example 2 Evaluate exponential expressions: (-2)5 • (-2)-5 =
2. (33)-2 = =
8-2
73 = 75
(-2) =
(-2)0 = 1
1 = 36 1
729
33•-2 =
3-6 =
82 = 64
73-5 =
7-2 =
1 = 72 1 49

6. Example 3
Simplify the expression. Write your answer using only positive exponents:
(3x-2y2)3 =
x-2y4 =
8xy6
33 • x-2•3 • y2•3 =
27x-6y6 =
27y6 x6
1• = 2
x-2-1 •
y4-6
1x-3y-2 = 2 1_
2x3y2

7. Homework
Section 8-3
Page 506 – 508
4,5, 7- 9, 11, 12, 14, 15, 18, 19, 21, 22, 24,
, , 39, 43