Answer
$-a^{2}b^{3}$
Work Step by Step
Step 1: $\sqrt[3] (-a^{6}b^{9})$
Step 2: $(-a^{6}b^{9})^{\frac{1}{3}}$
Step 3: $(-a^{6})^{\frac{1}{3}} \times (b^{9})^{\frac{1}{3}}$
Step 4: $(-a^{2})\times b^{3}$
Step 5: $-a^{2}b^{3}$
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