Class 9th Math New Syllabus 2025/ Chapter#01/ Radical Expressions and Laws ||PCTB||

A radical expression is a mathematical expression that includes a radical symbol (√), which represents a root. The most common radical is the square root (√), but there are also cube roots (∛), fourth roots, and higher-order roots.

Parts of a Radical Expression

1. Radical Symbol (√) – Indicates the root is being taken.


2. Radicand – The number or expression inside the radical.


3. Index – The small number outside the radical that tells which root is being taken (if no number is written, it is assumed to be 2 for square roots).



Examples of Radical Expressions

√16 = 4 (Square root of 16)

∛27 = 3 (Cube root of 27)

√(x²) = x (Square root of x squared)

4√(81) (Fourth root of 81)

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