College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter P - Prerequisites: Fundamental Concepts of Algebra - Exercise Set P.3 - Page 50: 133

Answer

False. $\sqrt 7 \times \sqrt 7 = \sqrt 49 = 7$

Work Step by Step

$\sqrt 7 \times \sqrt 7 = \sqrt (7 \times 7)$ $ = \sqrt 49 = 7$ or Rational exponents properties are the same as the properties for integer exponents. $a^{m} \times a^{n} = a^{m + n}$. So, $\sqrt 7 \times \sqrt 7 = $ $7^{1/2} \times7^{1/2} = 7^{(1/2) +(1/2)} = 7^{1} = 7$.
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