# Warm-up - PowerPoint PPT Presentation

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Session 17. Simplify each expression completely. Warm-up. Daily Quiz. Write each expression as a single power of the base. 7 3  7 6 (y 4 ) 3 Simplify each expression. (2y) 4 (3b 3 ) 2  b. Turn this in. Take out your homework. 7.2 Zero & Negative Exponents.

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Warm-up

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Session 17

Simplify each expression completely.

## Warm-up

### Daily Quiz

Write each expression as a single power of the

base.

• 73 76

• (y4)3

Simplify each expression.

• (2y)4

• (3b3)2  b

Turn this in.

## 7.2 Zero & Negative Exponents

### Use your calculator to evaluate.

What can you conclude?

A nonzero number to the zero power equals one.

• 50

• (-2)0

• (.45)0

• (1/7)0

• (1239)0

• 00

## Negative exponents move terms to the other part of the fraction.

4 is downstairs.

We will move it…

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

Example 1: Evaluate

x is downstairs.

We will move it…

Example 2

-9 is upstairs.

We will move it…

Example 3

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

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

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

Evaluate the expression without using a calculator.

Rewrite the expression with positive exponents.

### 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

## Work

p. 452 21 – 39 by 3s

and 51 – 62 all