Two years ago, the social psychologist Jonathan Haidt’s book about the dangers of social-media became a best-seller—and the subject of some critical eye-rolling. Now, for many, it’s become essential.

In this video playlist you will learn how to simplify complex numbers under a radical as well as raised to a higher power. You will learn to add, subtract, multiply and divide complex numbers to write ...

In this video playlist, you will learn how to simplify complex numbers under a radical as well as raised to a higher power. You will learn to add, subtract, multiply, and divide complex numbers to ...