Question

find the modulus and argument if Z = -2i​

Answer 1

Answer:

Let z = x + iy where x and y are real numbers and i = √(-1). Then the non-negative square root of (x2 + y2) is known as the modulus or absolute value of z. Modulus or absolute value of z is denoted by |z| and read as mod z. Hence if z = x + iy, then |z| = |x+iy| = +√x2 + y2.