College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter P, Prerequisites - Section P.4 - Rational Exponents and Radicals - P.4 Exercises: 8



Work Step by Step

$\sqrt{a^2+4}$ is not necessarily equal to $a+2$. For example: When $a=1$, $\sqrt{a^2+4} = \sqrt{1^2+4}=\sqrt{5}$ while $a+4 =1+4=5$ The quantities are not equal.
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