The square root of 14 is 3.74166. A square root is simply a number that, when multiplied by itself, yields the product in question. With some numbers, this is quite simple. The square root of 25 is 5, because 5 multiplied by itself is 25.
For numbers such as 14, in which no number can evenly be multiplied by itself to produce the number, finding a square root is done in the same method as long division. Squares can also be negative numbers because according to the rules of multiplication, a negative number multiplied by itself equals a positive number.