radical expression


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: Thesymbol 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.


Solved Example on Radical Expression

Evaluate the radical expression  when a = 2 and b = 4.
Choices:
A. 9
B. 8
C. 7
D. 6
Correct Answer: D
Solution:
Step 1:         [Substitute the values of a and b in the given radical expression.]
Step 2:                                    [Find the positive square root.]
Step 3:                                        [Multiply.]
Step 4:                                           [Add.]
Step 5: = 6                                            [Simplify.]

Related Terms for Radical Expression

  • Expression
  • Square Root
  • Variable
  • Radicand
  • Radical
  • Radical Equation
  • Radical Inequality