Complex number - Wikipedia
https://en.wikipedia.org/wiki/Complex_numberA complex number is a number of the form a + bi, where a and b are real numbers, and i is an indeterminate satisfying i = −1. For example, 2 + 3i is a complex number. This way, a complex number is defined as a polynomialwith real coefficients in the single indeterminate i, for which the relation i + 1 = 0 is imposed. Based on …
Online calculator: Complex numbers - PLANETCALC
https://planetcalc.com/7935The calculator displays complex number and its conjugate on the complex plane, evaluate complex number absolute value and principal value of the argument . It also demonstrates elementary operations on complex numbers. Starting from the 16th-century, mathematicians faced the special numbers' necessity, also known nowadays as complex numbers.