Arithmatical  Square Roots and Cube Roots
Important Facts and Formulae
1.  Square Root: 

If x^{2} = y, we say that the square root of y is x and we write
√y = x. Thus, √4 = 2, √9=3, √144=12 
2.  Cube Root: 

The cube root of a given number x is the number whose cube is x. 

We, denote the cube root of x by ^{3}√x 

Thus, ^{3}√8 = ^{3}√2x2x2 = 2. 