Holt Algebra 2 - Properties of Exponents


This lesson covers the properties of exponents in algebra. The warm-up exercises focus on simplifying expressions with exponents. The lesson presentation goes in-depth into the properties of exponents
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About Holt Algebra 2 - Properties of Exponents
PowerPoint presentation about 'Holt Algebra 2 - Properties of Exponents'. This presentation describes the topic on This lesson covers the properties of exponents in algebra. The warm-up exercises focus on simplifying expressions with exponents. The lesson presentation goes in-depth into the properties of exponents. The key topics included in this slideshow are . Download this presentation absolutely free.
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Slide1Holt Algebra 21-5 Properties of Exponents 7.2 Properties of Exponents Holt Algebra 2 Warm Up Warm Up Lesson Presentation Lesson Presentation Lesson Quiz Lesson Quiz
Slide2Holt Algebra 21-5 Properties of Exponents Warm Up Simplify. 1. 4 4 4 2. 3. 4. 5. 6. 10 5 7. 3 10 4 64 20 100,000 30,000
Slide3Holt Algebra 21-5 Properties of Exponents Simplify expressions involving exponents. Use scientific notation. Objectives
Slide4Holt Algebra 21-5 Properties of Exponents scientific notation Vocabulary
Slide5Holt Algebra 21-5 Properties of Exponents In an expression of the form a n , a is the base, n is the exponent, and the quantity a n is called a power. The exponent indicates the number of times that the base is used as a factor.
Slide6Holt Algebra 21-5 Properties of Exponents When the base includes more than one symbol, it is written in parentheses. A power includes a base and an exponent. The expression 2 3 is a power of 2. It is read “ 2 to the third power ” or “ 2 cubed. ” Reading Math
Slide7Holt Algebra 21-5 Properties of Exponents Write the expression in expanded form. Example 1A: Writing Exponential Expressions in Expanded Form The base is 5z, and the exponent is 2. 5 z i s a f a c t o r 2 t i m e s . (5 z ) 2 (5 z ) 2 ( 5 z )( 5 z )
Slide8Holt Algebra 21-5 Properties of Exponents Write the expression in expanded form. Example 1B: Writing Exponential Expressions in Expanded Form The base is s, and the exponent is 4. s is a factor 4 times. – s 4 – s 4 – ( s s s s ) = – s s s s
Slide9Holt Algebra 21-5 Properties of Exponents Write the expression in expanded form. There are two bases: h and k + 3. h is a factor 3 times, and k + 3 is a factor 2 times. Example 1C: Writing Exponential Expressions in Expanded Form 3 h 3 ( k + 3) 2 3 h 3 ( k + 3) 2 3 ( h )( h )( h ) ( k + 3)( k + 3)
Slide10Holt Algebra 21-5 Properties of Exponents Check It Out! Example 1a Write the expression in expanded form. The base is 2a, and the exponent is 5. 2a is a factor 5 times. (2 a ) 5 (2 a ) 5 ( 2 a )( 2 a )( 2 a )( 2 a )( 2 a )
Slide11Holt Algebra 21-5 Properties of Exponents Check It Out! Example 1b Write the expression in expanded form. The base is b, and the exponent is 4. b is a factor 4 times. 3 b 4 3 b b b b 3 b 4
Slide12Holt Algebra 21-5 Properties of Exponents Check It Out! Example 1c Write the expression in expanded form. There are two bases: 2x –1 , and y. 2x – 1 is a factor 3 times, and y is a factor 2 times. –(2 x – 1) 3 y 2 –( 2 x – 1 ) 3 y 2 – (2 x – 1)(2 x – 1)(2 x – 1) y y
Slide13Holt Algebra 21-5 Properties of Exponents
Slide14Holt Algebra 21-5 Properties of Exponents Caution! Do not confuse a negative exponent with a negative expression.
Slide15Holt Algebra 21-5 Properties of Exponents Simplify the expression. Example 2A: Simplifying Expressions with Negative Exponents The reciprocal of . 3 –2
Slide16Holt Algebra 21-5 Properties of Exponents Simplify the expression. Example 2B : Simplifying Expressions with Negative Exponents The reciprocal of .
Slide17Holt Algebra 21-5 Properties of Exponents Check It Out! Example 2a Simplify the expression. The reciprocal of . 3 2 3 3 = 9
Slide18Holt Algebra 21-5 Properties of Exponents Check It Out! Example 2b Write the expression in expanded form. The reciprocal of . (–5) –5 5 1 5
Slide19Holt Algebra 21-5 Properties of Exponents
Slide20Holt Algebra 21-5 Properties of Exponents Simplify the expression. Assume all variables are nonzero. Example 3A: Using Properties of Exponents to Simplify Expressions Product of Powers Simplify. 3 z 7 (–4 z 2 ) 3 ( –4) z 7 z 2 –12 z 7 + 2 –12 z 9
Slide21Holt Algebra 21-5 Properties of Exponents Simplify the expression. Assume all variables are nonzero. Example 3B: Using Properties of Exponents to Simplify Expressions Quotient of Powers Negative of Exponent Property Power of a Product Power of a Product ( yz 3 – 5 ) 3 = ( yz –2 ) 3 y 3 ( z –2 ) 3 y 3 z (–2)(3)
Slide22Holt Algebra 21-5 Properties of Exponents Check It Out! Example 3a Simplify the expression. Assume all variables are nonzero. Power of a Power Power of a Product (5 x 6 ) 3 5 3 ( x 6 ) 3 125 x (6)(3) 125 x 18
Slide23Holt Algebra 21-5 Properties of Exponents Negative Exponent Property Power of a Power Check It Out! Example 3b Simplify the expression. Assume all variables are nonzero. (–2 a 3 b ) –3
Slide24Holt Algebra 21-5 Properties of Exponents Scientific notation is a method of writing numbers by using powers of 10. In scientific notation, a number takes a form m 10 n , where 1 ≤ m < 10 and n is an integer. You can use the properties of exponents to calculate with numbers expressed in scientific notation.
Slide25Holt Algebra 21-5 Properties of Exponents Simplify the expression. Write the answer in scientific notation. Example 4A: Simplifying Expressions Involving Scientific Notation Divide 4.5 by 1.5 and subtract exponents: –5 – 6 = –11. 3.0 10 –11
Slide26Holt Algebra 21-5 Properties of Exponents Because 22.1 > 10, move the decimal point left 1 place and add 1 to the exponent. Multiply 2.6 and 8.5 and add exponents: 4 + 7 = 11. Simplify the expression. Write the answer in scientific notation. Example 4B: Simplifying Expressions Involving Scientific Notation 22.1 10 11 (2.6)(8.5) (10 4 )( 10 7 ) (2.6 10 4 ) (8.5 10 7 ) 2.21 10 12
Slide27Holt Algebra 21-5 Properties of Exponents Check It Out! Example 4a Simplify the expression. Write the answer in scientific notation. Because 0.25 < 10, move the decimal point right 1 place and subtract 1 from the exponent. Divide 2.325 by 9.3 and subtract exponents: 6 – 9 = –3. 0.25 10 –3 2.5 10 –4
Slide28Holt Algebra 21-5 Properties of Exponents Because 12.4 >10, move the decimal point left 1 place and add 1 to the exponent. Multiply 4 by 3.1 and add exponents: –6 – 4 = –10. Check It Out! Example 4b Simplify the expression. Write the answer in scientific notation. 12.4 10 –10 (4)(3.1) (10 –6 )( 10 –4 ) (4 10 –6 ) (3.1 10 –4 ) 1.24 10 –9
Slide29Holt Algebra 21-5 Properties of Exponents You try! Simplify each expression. 1. 4 –3 2. 3. 8 y 6 (–6 y 3 ) Simplify each expression. Assume all variables are nonzero. 4. Simplify each expression. Write the answer in scientific notation. 5.
Slide30Holt Algebra 21-5 Properties of Exponents You try! Answers Simplify each expression. 1. 4 –3 2. 3. 8 y 6 (–6 y 3 ) Simplify each expression. Assume all variables are nonzero. 4. Simplify each expression. Write the answer in scientific notation. 5. 4.0 10 –10 –48 y 9