To simplify \(\sqrt{18}\), you can factor 18 into its prime factors:
\[ 18 = 9 \times 2 = 3^2 \times 2 \]
Now, you can take the square root:
\[ \sqrt{18} = \sqrt{9 \times 2} = \sqrt{9} \times \sqrt{2} = 3\sqrt{2} \]
So, \(\sqrt{18}\) simplified is \(3\sqrt{2}\).