Question

$( \frac{2}{ \sqrt{5} } ) {}^{ - 3}$
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Answer 1

(2/√5)⁻³=(√5/2)³=5√5/8

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Answer 2

$(\frac{2}{\sqrt{5}})^{-3}=(\frac{\sqrt{5}}{2})^{3}=\frac{(\sqrt{5})^3}{2^3}=\frac{5\sqrt{5}}{8}.$

@robertinnifd