Square and Square Root (Exercise)

 Square of a number : When a number is multiplied by itself then that product is called square of a number. 

                   For example: Square of 3 = (3)² = 3x3 = 9

Note: Square of negative number is always positive.

                  For example: Square of  (-5) = (-5)² = -5 x -5 = (+ 25)

Square Root : When a number is multiplied by itself to get the original number, then it is called square root. It is denoted by the symbol √ (Tick) called radical.

For example: Square root of 9 = √9= √3x3  = 3