Answer
$16x^{4}$
Work Step by Step
$\sqrt (256x^{8})=16x^{4}$, because $(16x^{4})^{2}=16x^{4}\times16x^{4}=(16\times16)\times x^{4+4}=256x^{8}$
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 7 - Section 7.1 - Radicals and Radical Functions - Exercise Set - Page 417: 42
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