Mark H. answered 01/07/20
Tutoring in Math and Science at all levels
The modulus of a complex number is the absolute value of the length of the vector plotted on the complex plane. To get the modulus, we simply use the Pythagorean Theorem with the magnitude of the real and complex components.
So--for this one--the modulus = √(22 + 32 ) (use only the positive root)