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.
Complex conjugate - Math
https://www.math.net/complex-conjugateThe complex conjugate is particularly useful for simplifying the division of complex numbers. This is because any complex number multiplied by its conjugate results in a real number: (a + b i ) (a - b i) = a 2 + b 2 Thus, a division problem involving complex numbers can be multiplied by the conjugate of the denominator to simplify the problem.