Final answer:
To simplify √54, find the largest perfect square that is a factor of 54 and rewrite the expression as the square root of that number multiplied by the square root of the remaining factor. The simplified form is 3√6.
Step-by-step explanation:
To simplify √54, we need to find the largest perfect square that is a factor of 54. Since 9 is a perfect square and a factor of 54, we can rewrite the expression as √(9 * 6). Taking the square root of 9 gives us 3, so the simplified form is 3√6. Therefore, option C is the correct answer.
Learn more about Simplifying square roots