Answer
Not in simplest form.
Work Step by Step
$6-\sqrt[3] {54}=6-\sqrt[3] {27}\sqrt[3] {2}=6-3\sqrt[3] 2$
The radicand has perfect $n$th power as factor other than $1$.
Therefore, the expression is not in simplest form.
Big Ideas Math - Algebra 1, A Common Core Curriculum
by Larson, Ron; Boswell, Laurie
Published by
Big Ideas Learning LLC
ISBN 10:
978-1-60840-838-2
ISBN 13:
978-1-60840-838-2
Chapter 9 - Solving Quadratic Equations - 9.1 - Properties of Radicals - Exercises - Page 485: 12
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