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9. Roots and Radicals

9. Roots and Radicals / Introduction to Radical Expressions / Problem 3

Problem 3

Simplify the expression fully, assuming $x$ is any real number: $\sqrt[4]{81 x^{8}}$

A

$- 3 ∣ x^{2} ∣$

B

$9 x to the fourth power$

C

$3 ∣ x ∣$

D

$3 x squared$