Answer
$-27$
Work Step by Step
Step 1: $-9^{\frac{3}{2}}$
Step 2: $(-3^{2})^{\frac{3}{2}}$
Step 3: Simplifying exponents, $2\times\frac{3}{2}=3$
Step 4: The expression now becomes $(-3^{3})$ or $-27$
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