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.
The number inside the radical sign is called the radicand.
Radicals are the inverse of exponents. For example, to "undo" a square, you take the square root.
Study and practice
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working with radicals in algebra