Learn about the imaginary unit i, about the imaginary numbers, and about square roots of negative numbers.

a is called the real part of the number, and b is called the imaginary part of the number. The table below shows examples of complex numbers, with the real and imaginary parts identified. …

Learn about the imaginary unit, "i", a unique number defined as the square root of -1. It's a key part of complex numbers, which are in the form a + bi. The powers of "i" cycle through a set of …

Sal explains how we obtain complex numbers by adding real numbers and imaginary numbers.

We'll learn what imaginary and complex numbers are, how to perform arithmetic operations with them, represent them graphically on the complex plane, and apply these concepts to solve …

Learn how to simplify any power of the imaginary unit i. For example, simplify i²⁷ as -i.

Dive into expressions involving the imaginary unit 'i', simplifying them to reveal the real and imaginary components. Learn how real and imaginary numbers are subsets of complex …

Learn about the imaginary unit i, about the imaginary numbers, and about square roots of negative numbers.

This topic covers: - Adding, subtracting, multiplying, & dividing complex numbers - Complex plane - Absolute value & angle of complex numbers - Polar coordinates of complex numbers

This video is intended as a review of complex numbers. If this idea is new for you check out Sal's complex number videos in the Algebra 2 section of KA. Complex numbers, "z", have the form …