'The symbol <i>i</i> is used to represent the imaginary square root of this number'
-1
MATHEM-ATTACK!: The symbol <i>i</i> is used to represent the imaginary square root of this number
The symbol <i>i</i> is used to represent the imaginary square root of this number
The symbol <i>i</i> is used to represent the imaginary square root of this number
MATHEM-ATTACK!
-1
MATHEM-ATTACK!