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complex number
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- Khan Academy - Intro to complex numbers
- University of Oxford - Mathematical Institute - Complex Numbers
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- Story of Mathematics - Complex Numbers – Properties, Graph, and Examples
- Mathematics LibreTexts - Introduction to Complex Numbers
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complex number, number of the formx +yi, in whichx andy are real numbers andi is the imaginary unit such thati2 = -1.Seenumerals and numeral systems.