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 - Page 551: 126

Answer

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Work Step by Step

Two expressions are algebraic conjugates if they differ only in the sign between two terms. For example $a+\sqrt b$ and $a-\sqrt b$. Multiplying conjugates eliminates the radical: $(a+\sqrt b)(a-\sqrt b)=a^2-b$. The numbers: $5+\sqrt{3}$ and $5-\sqrt{3}$ are conjugates of each other.
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