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Page 1: Warm-up

Warm-upSession 17

Simplify each expression completely.

83

92

34

336

x.4

48 .3

45 .2

.1

xx

aab

xx

yx

918 yx7000,40 x

211256 ba12x

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Daily Quiz

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Write each expression as a single power of the

base.1. 73 76

2. (y4)3

Simplify each expression.3. (2y)4

4. (3b3)2 b

Turn this in.

Take out your homework.

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7.2 Zero & Negative Exponents

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Use your calculator to evaluate.

1. 50

2. (-2)0

3. (.45)0

4. (1/7)0

5. (1239)0

6. 00

What can you

conclude?A nonzero number to the zero

power equals one.

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Negative exponents

move terms to the other part of the fraction.

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Negative exponents move terms to the other part of the fraction. (reciprocal)

Example 1: Evaluate

x

y24

x

y24

4 is downstairs.We will move it…

x

y16

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Example 2

4

3

x

1

3 4x 43x

x is downstairs.We will move it…

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Example 3

29

29

1

81

1-9 is upstairs.

We will move it…

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Now let’s include what we learned from last class.

33 44 334 04 1

423 83 6561

What do we know that we can do with these exponents?

What do we know that we can do with these exponents?

225 210 2)10(

1

100

1

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Evaluate the expression without using a calculator.

2

21

32

43 .6

3 .5

44 .4

-

4

1

9

144

1

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Rewrite the expression with positive exponents.

3

2

33

5 .9

3 .8

2 .7

b

x

yx3

32

x

y

23x

3125

1

b

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Class work:SPW 65What do you call it when a plane comes down in a garbage heap?

• Turn this in on the cart when you are finished

• Make sure your name is on it

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Work

p. 452 21 – 39 by 3s

and 51 – 62 all