
Section 9.4 Multiplying Radical Expressions Copyright © 2013, 2010, 2006, 2003 Pearson Education, Inc.
For all positive numbers a and b, 3 3
Example Multiply. a. b.
Example Multiply. a.
Example Multiply. Multiply the coefficients and the radicals. Look for perfect square factors. Simplify. Multiply.
Example Multiply. Multiply the coefficients and the radicals. Look for perfect square factors. Simplify. Multiply.
Example Multiply and simplify. Distribute.
Example Multiply and simplify. Distribute.
Multiply. Example Use the FOIL method to obtain four products.
Multiply. Example
Multiply. (2x + 4)(2x 4) 4x2 4x2 16 Remember this? + 8x 8x 16 What happens? You lose your middle term. Perfect Squares Special FOIL
Example Multiply. The inner and outer terms cancel. FOIL. Example Special
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