Definition of Radical Expression

A radical expression is an expression containing a square root.

Examples of Radical Expression

are examples of radical expression

More about Radical Expression

Radical: The √ symbol that is used to denote square root or nth roots.
Radicand: Radicand is a number or expression inside the radical symbol.
For example, 5 is the radicand in .
Radical equation: An equation containing radical expressions with variables in the radicands.
Radical inequality: An inequality containing a radical expression with the variable in the radicand.

Video Examples: Radical Expression

Solved Example on Recursive Formula

Ques: Evaluate the radical expression   when a = 2 and b = 4.

  • A. 9
  • B. 8
  • C. 7
  • D. 6

Correct Answer: D


  • Step 1:    [Substitute the values of a and b in the given radical expression.]
  • Step 2 :=       
  • Step 3:      Multiply.]
  • Step 4: = 6 [Simplify.]

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