**1. Square Root:**

If

*x*, we say that the square root of y is x and we write √y = x.^{2}= y
Thus, √4 =
2, √9 = 3,√196 = 14.

**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√(2 x 2 x 2) = 2, 3√343 =3√( 7 x 7 x 7) = 7 etc.

**Note:**

1. √(xy) =
√x *√ y

2. √( x/y) = √x/√y = (√x/√y)*( √y/√y) = √(xy)/y

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