8.2 Multiplying Rational Expressions CORD Math Mrs. Spitz Fall 2006

Objectives:  Students should be able to multiply rational expressions,  State excluded values, and  Factor and simplify rational expressions.

Assignment  Pg. 313 #3-32 all

Introduction  To multiply fractions, you multiply the numerators and multiply the denominators.  You can use this same method to multiply rational expressions.

Ex. 1: Find. State excluded values.  To multiply fractions, you multiply the numerators and multiply the denominators.  You can use this same method to multiply rational expressions.

Ex. 1: Find. State excluded values. Multiply Factor Simplify

More information  From this point on, it will be assumed that all replacements for variables in rational expressions that result in denominators equal to zero will be excluded.  You may find it easier to use a shortcut before multiplying fractions as shown in the next slide  You can use the same shortcut when multiplying rational expressions

Find Simplify

Ex. 3 Find. Simplify x≠0, -5, -2

Ex. 4 Find. Simplify x≠5, -5, -2

Ex. 5 Find. Simplify x≠3, -3, -2