
 Complex number Summary 
  Complex numbers are generally expressed in the form a + bi, where a represents any real number (rational or irrational) and b represents the re... 
  The set of complex numbers includes all the numbers we commonly work with in school mathematics (whole numbers, fractions, decimals, square roots, etc.), plus many more numbers that are generally not encountered until the study of higher mathematics. 
  In mathematics, a complex number is a number of the form where a and b are real numbers, and i is an imaginary number, called the imaginary unit, with the property i 2= −1. 
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