Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 5 - Section 5.4 - Multiplying Polynomials - Vocabulary, Readiness & Video Check: 3


b., $x^{2}-49$

Work Step by Step

$(x+7)(x-7)$ As shown on page 286, the product of the sum and difference of a two terms is given by the following formula: $(a+b)(a-b)=a^{2}-b^{2}$ In this case, $a=x$ and $b=7$. $(x+7)(x-7)=x^{2}-7^{2}=x^{2}-49$
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