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# ComplexNos - Sec 2.2 Complex Numbers This section is...

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Sec. 2.2 – Complex Numbers This section is covered mainly as review . You should already have learned about complex numbers and how to use them in calculations and in simplifying expressions. A complex number is so named because it is “complex”, that is, a difficult number, an involved number, a complicated number. A complex number is made up of two terms : a real term and an imaginary term. Remembering that a 1 i - = , a pure imaginary number is one of the form bi , where b is a real coefficient. Ex. 3 i , 2 i - , i A complex number is defined as a number in the form a + bi , where a and b are real numbers. Ex. 2 3 i + , 7 i - , 1 i - , 2 7 i + Note that 3 is a rational number because 3 can be written in the form of a rational number as 3 1 , 6 2 , etc. Also, 3 is a complex number since 3 can be written in the form of a complex number as 3 0 i + . And the pure imaginary number 2 i is a complex number since it can be written in the form 0 2 i + . So the complex numbers include all of our numbers we

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ComplexNos - Sec 2.2 Complex Numbers This section is...

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