Sec-52 - Math 1300 Multiplication and Division of Rational...

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Math 1300 Section 5.2 Notes 1 Multiplication and Division of Rational Expressions Multiplication Multiplication of rational expressions is done similar to multiplication of fractions. When multiplying two fractions, the product of the numerators is the answer’s numerator. The product of the denominators is the answer’s denominator. This is the same rule for the multiplication of rational expressions: put the product of the numerators over the product of the denominators. If possible, cancel out common factors before multiplying. Examples: 1. Find the product of ab a ba ab 3 2 4 2 3 . a b b a b b a b b a a a b b a 6 2 1 2 3 2 4 3 2 4 6 2 1 2 2 2 3 = = = 2. Find the product of x x 2 5 6 4 . 3 3 1 3 4 15 4 4 15 1 15 2 0 3 2 5 1 6 2 5 6 x x x x x x x x = = = = 3. Multiply: 1 4 2 3 + - + - x x x x ( 29 ( 29 ( 29( 29 2 3 12 7 1 2 4 3 1 4 2 3 2 2 + + + - = + + - - = + - + - x x x x x x x x x x x x 4. Find the product of 4 3 9 3 2 2 - + - + x x x x ) 4 )( 3 ( ) 3 2
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This note was uploaded on 02/22/2012 for the course MATH 1300 taught by Professor Staff during the Spring '08 term at University of Houston.

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Sec-52 - Math 1300 Multiplication and Division of Rational...

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