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Math K-Plus

Roots - Learn About Square Roots, Radical, And Radicand

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What Are Square Roots, Radical, And Radicand?


A Square Root of a positive whole number "n" is written √n. This notation, √n, is pronounced "square root of n". So what does √n mean? Well if we write the square root of "n" times the square root of "n", we get an answer of "n". Here is an abstract example √n × √n = n. Here is a real example: √9 × √9 = 3 × 3 = 9. Or another way √9 = 3 × 3 = 3
  • We can take the square root of any positive number; for example √5 equals 2.2360679774997896964091736687313.... And 5 × 5 = 5
  • The √ is called the Radical sign. The number under the radical sign is called the Radicand.
  • Perfect squares have Whole Number roots.
  • The square roots of all other positive numbers are on the number line, but they are Irrational Number. For example: √2 equal 1.4142135623730950488016887242097...

Input Syntax

Calculator Input Syntax


Math Expression


Squares Answer


r2 2 1.4142135623730950488016887242097...
r9.3 9.3 3.0495901363953812473643956050021...
r25 25 5
r-25 -25 The square root of a negative number
is beyond the scope of this discussion.



Please Read! To use this calculator is easy. You can use any input format shown in the table above. You indicate the radical sign with the letter "r". Example r25 = √25 = √5 x 5 = 5.


Square Root Calculator
Enter The Number Here Then Press The SUBMIT Button