Root
1. Root of a number
The root of a number x is another number, which when multiplied by itself a given number of times, equals x.
For example the second root of 9 is 3, because 3x3 = 9.
 The second root is usually called the square root.
 The third root is susually called the cube root
See Root (of a number).
2. Roots of a polynomial
The roots of a polynomial are the values of the variable that cause the polynomial to evaluate to zero.
For example the roots of
are +2 and 2.
See Roots of a polynomial.
Definition of 'radical' as used in math
Definition of radical sign as used in math
Definition of radicand
Definition of the root of a number as used in math
Definition of the roots of a polynomial.
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