Square root (1)
1. concept of root
In the upper figure, we see the floor of a square room that has 100 tiles. How many tiles will the room have on each side? To solve this problem, we must found a number that when we raised it to the square is 100. The result is 10 because 10 x 10 = 100 , 102 = 100.
Therefore, the square root of 100 is 10.
2. Elements of the root
The number 36 is the square of 6. We can also say that 6 is the square root of 36. The symbol Ö
is called radical sing.
In the previous example, 36 is called radicand, 6 is the square root and Ö is the radical sign.