Complex Numbers (Jump to: Lecture | Video )

Pure Imaginary Numbers

Pure Imaginary Numbers are the square roots of negative real numbers, such as:

Complex Numbers

A complex number is any number written in the form:

a + bi

Where a and b are real numbers, and i is the imaginary unit.

Complex numbers can be added and subtracted as shown below:

Figure 1.

Here we have an equation that contains complex numbers:

4x 6 + (2y - 8)i = 6 + 4i

To solve this equation, set the real parts equal to each other, and set the imaginary parts equal to each other.

Figure 2.

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