Answer
$2|x|$
Work Step by Step
$\sqrt[3]{\sqrt{64x^{6}}}=(8|x^{3}|)^{1/3}=2|x|$
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
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 - Page 30: 37
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