Complex numbers are a type of number that extends the concept of the one-dimensional number line to a two-dimensional number plane. A complex number is composed of two parts: a real part and an imaginary part. It can be expressed in the form: \[ z = a + bi \] where: - \( z \) is the complex number. - \( a \) is the real part (a real number). - \( b \) is the imaginary part (also a real number).
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