# Editing IQ Complex Tutorial

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A complex number is a number of the form ''a'' + ''jb'', where ''a'' and ''b'' are real numbers, and ''j'' is an indeterminate satisfying ''j''<sup>2</sup>=-1 (Mathematician prefer using ''i'' instead of ''j'' used by physicist and radio engineers). For example, z<sub>1</sub>=2 + ''j''3 is a complex number. The real part Re{''z''} of z<sub>1</sub> is 2 and its imaginary part Im{''z''} is 3. | A complex number is a number of the form ''a'' + ''jb'', where ''a'' and ''b'' are real numbers, and ''j'' is an indeterminate satisfying ''j''<sup>2</sup>=-1 (Mathematician prefer using ''i'' instead of ''j'' used by physicist and radio engineers). For example, z<sub>1</sub>=2 + ''j''3 is a complex number. The real part Re{''z''} of z<sub>1</sub> is 2 and its imaginary part Im{''z''} is 3. | ||

<math>z=a+jb </math> | <math>z=a+jb</math> | ||

<math>\text{Re}\{z\}=a</math> | <math>\text{Re}\{z\}=a</math> | ||

<math>\text{Im}\{z\}=b</math> | <math>\text{Im}\{z\}=b</math> |