The square root of -4 involves the concept of imaginary numbers, as the square root of a negative number is not a real number. In the realm of complex numbers, the square root of -1 is represented by the imaginary unit “i.” Therefore, the square root of -4 can be expressed as 2i, where “i” is the imaginary unit.
So, the roots of √-4 are ±2i. The “±” indicates that both positive and negative multiples of the imaginary unit are valid solutions.
