# Radical Numbers

Wednesday, December 14th, 2011 at
10:38 pm

# Radicals

# A square root is a radical number.

### We use the symbol to indicate the ‘square’ root of a.

### The cube root of a is written as .

### If , the root is a square root.

### If , the root is a cube root.

### The Principal root is that has the same sign as a.

### is the index of the radical

### is called the radicand

## root of Real Numbers

## Real No a Positive Integer n Roots of a

## n is even

## n is odd

## n is even no real roots

## n is odd or even

### Examples of each of the above 4 possible events.

## Perfect Squares

## Perfect Cubes

**Filed under: **Pre-requisites for Pre-Calculus

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