The square root of 40 in its simplest form means to get the number 40 inside the radical √ as low as possible. Take it like this: 1. You can sign in to give your opinion on the answer. lenpol7 . Sqrt(40). Here is how to do that! 0 0. If you need the decimal, it's about 6.32455. 40 is equal to the square root of 41 2 - 9 2 and the square root value of 40 is 6.32456. Factors of 40 are: 1, 2, 4, 5, 8, 10, 20, 40 2. Use the square root calculator below to find the square root of any real number, positive or negative. 4X10= 40 take the square root of 2 and makes exactly a 2, and just leave the square root of 10 with radical sign so the answer is 2i square root of 10 What do you think of the answers? Find the square root of 40 or any other real number, positive or negative. Sign in. Lv 7. Square root of 40. Here are the answers to questions like: Square root of 40 or what is the square root of 40? 8 years ago. So sqrt(40) = 2 * sqrt(10), which is what your calculator is telling you. See also on this page a square root chart 1 to 100. First we write the square root of 40 like this: √ 40 The largest perfect square of the factors of 40 is 4. sqrt(40) = sqrt(4) * sqrt(10) And the square root of 4 is 2. Which of these factors is a perfect square? The Square root of 40 is about 6.32. Rounded to two decimal places, the Square root of 40 is equal to Â±6.32.6.32455532