Learn about the square root symbol (the principal root) and what it means to find a square root. Also learn how to solve simple square root equations.

Learn how square root means what number multiplied by itself will result in the given number. Created by Sal Khan and Monterey Institute for Technology and Education.

In this unit, we review exponent rules and learn about higher-order roots like the cube root (or 3rd root). We'll learn how to calculate these roots and simplify algebraic expressions with radicals.

The inverse operation of taking the square is taking the square root. However, unlike the other operations, when we take the square root we must remember to take both the positive and the …

Practice finding the square root of a perfect square positive integer.

When taking square roots the answer can either be a positive or negative number, so we use the plus or minus symbol to represent that. Which value we use actually depends on the problem …

Sal solves challenging quadratic equations like (4x+1)²-8=0 by taking the square root of both sides. Created by Sal Khan and CK-12 Foundation.

Learn the meaning of cube roots and how to find them. Also learn how to find the cube root of a negative number.

Practice finding the square root of a perfect square positive integer.

The quadratic formula, however, virtually gives us the same solutions, while letting us see what should be applied the square root (instead of us having to deal with the irrational values …