Video shows how to divide complex numbers by using complex conjugates in general terms and then with a specific example. [8:58]

Video first reviews what imaginary and complex numbers are. Shows example of graphing a complex number. Gives general explanations and formulas for adding, subtracting, multiplying and dividing complex numbers. Includes link to...

Video shows working a problem from the IIT JEE test which involves using algebraic manipulation to determine the validity of an equation with magnitudes of the differences of certain complex numbers. [7:21]

Video shows working a problem from the IIT JEE test which involves determining whether the determinant of a matrix of four given complex numbers is 0. [3:09]

Video shows working a problem from the IIT JEE test which involves algebraic manipulation and using what the argument of complex numbers is to visually reason if two given equations about arguments are true. [7:26]

Video explains what complex numbers are and shows how to write them. Includes an example of writing a real number as a complex number. [2:21]

Video shows how to simplify the square root of a negative number using the imaginary unit i. [4:04]

Video shows how to simplify the square root of a negative number using the imaginary unit i.