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Important Formulas - Square Root and Cube Root - Tricks & Shortcuts

1. Square Root:
If x2 = y, we say that the square root of y is x and we write √y = x.
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


Important Formulas - Square Root and Cube Root - Tricks & Shortcuts Important Formulas - Square Root and Cube Root - Tricks & Shortcuts Reviewed by Job today on 21:47 Rating: 5

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