Imaginary numbers are the square roots of negative numbers and all the properties of square roots extend to radicands containing complex numbers. Imaginary numbers are part of the complex number system. This system allows us to find the square roots of negative numbers, which was impossible to do in the real number system. You'll learn how the square root of -1 is defined and how to use that definition to find the square root of any other negative number. A complex number has two parts: the real part, and the imaginary part. In the lecture, you'll learn when the two complex numbers are equal, and how to apply operations like addition and multiplication in this number system.
*These practice questions are only helpful when you work on them offline on a piece of paper and then use the solution steps function to check your answer.
Imaginary and Complex Numbers
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.