Final answer:
The simplified form of √144x³⁶ is 12xⁱ⁸.
Step-by-step explanation:
To simplify the expression √(144x36), we can break down the terms inside the square root. The square root of 144 is 12, and the square root of x36 is x18. Therefore, the simplified form of √(144x36) is 12x18. Option B, 12x18, is the correct choice.