What is the square root of 40?

The square root of 40 (√40) is an irrational number. This means it cannot be expressed as a simple fraction of two integers.

Its decimal approximation is approximately 6.32455532.

It can be simplified to 2√10 by factoring out the largest perfect square from 40, which is 4 (since 4 x 10 = 40). The square root of 4 is 2, leaving √10 under the radical.

Therefore, √40 = 2√10. The radical is the symbol that represents the square root.