What is a complex number

The video tutorial introduces the concept of complex numbers, explaining the imaginary unit 'i' as the square root of -1. It distinguishes between real and imaginary numbers and describes how complex numbers are formed by combining these two types. The standard form of a complex number, a + bi, is discussed, where 'a' and 'b' are real numbers. The tutorial provides examples to illustrate the concept, emphasizing that complex numbers consist of both real and imaginary parts.

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