Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 7 - Section 7.5 - Multiplying with More Than One Term and Rationalizing Denominators - Exercise Set: 30

Answer

$-41$

Work Step by Step

RECALL: $(a-b)(a+b)=a^2-b^2$ Use the formula above with $a=3$ and $b=5\sqrt{2}$ to obtain: $=3^2- (5\sqrt{2})^2 \\=9-5^2(2) \\=9-25(2) \\=9-50 \\=-41$
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