To simplify the expression \( \frac{30\sqrt{27}}{-6\sqrt{3}} \), we start by simplifying both the numerator and the denominator.
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Simplifying the numerator: \[ 30\sqrt{27} = 30\sqrt{9 \times 3} = 30 \times 3\sqrt{3} = 90\sqrt{3} \]
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The denominator is: \[ -6\sqrt{3} \]
Now, replace the numerator and the denominator in the expression: \[ \frac{90\sqrt{3}}{-6\sqrt{3}} \]
- The \(\sqrt{3}\) terms in the numerator and denominator cancel out: \[ \frac{90}{-6} = -15 \]
Thus, the simplified expression is: \(-15\)
Therefore, the answer is: \(-15\) (negative 15)