To simplify the expression \(\sqrt{54} \cdot 3\), you can start by simplifying \(\sqrt{54}\).
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Factor \(54\) into its prime factors: \[ 54 = 9 \times 6 = 3^2 \times 6 \]
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Now, find the square root of \(54\) using the prime factorization: \[ \sqrt{54} = \sqrt{9 \times 6} = \sqrt{9} \cdot \sqrt{6} = 3\sqrt{6} \]
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Now multiply that by \(3\): \[ \sqrt{54} \cdot 3 = 3\sqrt{6} \cdot 3 = 9\sqrt{6} \]
So, the expression \(\sqrt{54} \cdot 3\) simplified is \(9\sqrt{6}\).