Complex Numbers and the Complex Plane

The video tutorial explains how to plot complex numbers on a two-dimensional grid, known as the complex plane. It introduces the concept of complex numbers, detailing their real and imaginary parts. The tutorial then demonstrates how to plot these numbers on the complex plane, where the horizontal axis represents the real part and the vertical axis represents the imaginary part. Several examples are provided to illustrate the process of plotting different complex numbers.

What is the real part of the complex number -2 + 2i?

• 2

• 4

• -2

• 0

In the complex plane, what does the vertical axis represent?

• Imaginary part

• Real part

• Magnitude

• Phase

For the complex number 5 + 2i, what is the imaginary part?

• 0

• 5

• 2

• -2

What is the real part of the complex number 1 + 5i?

• -1

• 0

• 5

• 1

For the complex number 4 - 4i, what is the imaginary part?

• 0

• 2

• -4

• 4

Which of the following complex numbers has a negative imaginary part?

• 1 + 5i

• 5 + 2i

• -2 + 2i

• 4 - 4i