Skip to main content
It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
In this module you can study radicals, such as square roots and cube roots.
The 11-minute video above is a long explanation of square roots and radicals. She starts by reviewing how to square a number. If you want to skip that part, start the video at 3:00.
This video demonstrates how taking a square root of a number is the opposite of squaring a number.
Did you know?
Study square roots
Take a lesson in square roots at math.com. At the end of the lesson, there's an online quiz to help you check your understanding.
The number inside the radical sign is called the radicand .
Radicals are the inverse of exponents. For example, to "undo" a , you take the square . square root
Study and practice
Use this search term to find additional resources :
square roots working with radicals in algebra mathematics radicals