Simplify. \( 4 \sqrt[9]{6}-6 \sqrt[9]{6} \) \( [?] \sqrt[9]{\square} \)

To simplify \( 4 \sqrt[9]{6} - 6 \sqrt[9]{6} \), first, notice that both terms have a common factor of \( \sqrt[9]{6} \). We can factor this out: \[ (4 - 6) \sqrt[9]{6} = -2 \sqrt[9]{6} \] Thus, the expression becomes: \[ [-2] \sqrt[9]{6} \] So, in the format requested, it is: \(-2 \sqrt[9]{6}\)