Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 8 - Polynomials and Factoring - 8-4 Multiplying Soecial Cases - Practice and Problem-Solving Exercises: 28

Answer

$x^{2}-9$

Work Step by Step

...identify which terms correspond to $a $and $b$ in the rule for the product of a sum and difference. ($(a+b)(a-b)=a^{2}-b^{2}$) $a=x,\ b=3$ ...substitute for $a $ and $b $ in the rule $(x+3)(x-3)=x^{2}-3^{2}$ ...simplify. =$x^{2}-9$
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