What Are The Definitions of Square Root, Radical, And Radicand?

What Are Square Root, 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 1.414213562373095048801...∞