5.6 handout

# 5.6 handout - 5.6 Notes Objectives: to identify and graph...

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1 5.6 Notes Complex Numbers Objectives: c to identify and graph complex numbers c to add, subtract, and multiply complex numbers. KEY TERMS: -imaginary number -complex numbers Identifying Complex Numbers In Chapter 1 we classified all types of REAL numbers. (natural, integers, rational, irrational, etc. ..) Today we’re going to talk about the imaginary number “i” and complex numbers i the “imaginary number” Any number squared is. ..? a) positive b) negative c) equilateral 1 2 - = i So back in the 1500’s a mathematician came up with the number i. The “i” stands for imaginary. But it has practical applications 1 - = i Not so imaginary (http://en.wikipedia.org/wiki/Imaginary_number) c Imaginary numbers were defined in 1572 by Rafael Bombelli . At the time, such numbers were regarded by some as fictitious or useless, much as zero and the negative numbers. c For most human tasks, real numbers (or even rational numbers) offer an adequate description of data. Fractions such as and

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## This note was uploaded on 05/13/2011 for the course MTH 98 taught by Professor Johnson during the Fall '09 term at Grand Valley State University.

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5.6 handout - 5.6 Notes Objectives: to identify and graph...

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