Complex number

Figure 1: A complex number plotted as a point (red) and position vector (blue) on an Argand diagram; a+bi is the rectangular expression of the point.

Addition of two complex numbers can be done geometrically by constructing a parallelogram.

A complex number is a number that can be expressed in the form $a + bi$ , where $a$ and $b$ are real numbers and $i$ is the imaginary unit, that satisfies the equation $i = -1$ . In this expression, $a$ is the real part and $b$ is the imaginary part of the complex number.

单词	Complex value
释义	Complex value 英语百科 Complex number A complex number is a number that can be expressed in the form $a + bi$ , where $a$ and $b$ are real numbers and $i$ is the imaginary unit, that satisfies the equation $i = -1$ . In this expression, $a$ is the real part and $b$ is the imaginary part of the complex number.
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Complex value

Complex number