Radical
Definition
Radical Definition

When dealing with SQUARE roots, the index is two. When the index is two, it is usually not written with the radical sign.

Examples (Square Root)
Example (square root)
Example (square root): Radical Definition
Divider Line

Let x = 9 (nine is a perfect square).

Example (square root) x = 9
Example (square root) x = 9: Radical Definition
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Let x = 10 (ten is NOT a perfect square).

Example (square root) x = 10
Example (square root) x = 10: Radical Definition
Examples (Cube Root)
Example (cube root)
Example (cube root): Radical Definition
Divider Line

Let x = 8 (eight is a perfect cube).

Example (cube root) x = 8
Example (cube root) x = 8: Radical Definition
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Let x = 9 (nine is NOT a perfect cube).

Example (cube root) x = 9
Example (cube root) x = 9: Radical Definition
Examples (Seventh Root)
Example (seventh root)
Example (seventh root): Radical Definition
Divider Line

Let x = 128.

Example (seventh root) x = 128
Example (seventh root) x = 128: Radical Definition
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Let x = 13.

Example (seventh root) x = 13
Example (seventh root) x = 13: Radical Definition