The square root of 40 can be simplified by breaking it down into its prime factors. The number 40 can be written as 4 times 10, and since 4 is a perfect square, we can take the square root of it.
So, we can express the square root of 40 as:
√40 = √(4 × 10) = √4 × √10 = 2√10.
Thus, the simplified square root of 40 is 2√10.