Cube roots review
Review cube roots, and try some practice problems.
The cube root of a number is the factor that we multiply by itself three times to get that number.
The symbol for cube root is .
Finding the cube root of a number is the opposite of cubing a number.
Want to learn more about finding cube roots? Check out this video.
Finding cube roots
If we can't figure out what factor multiplied by itself three times will result in the given number, we can make a factor tree.
Here is the factor tree for :
So the prime factorization of is .
We're looking for , so we want to split the prime factors into three identical groups.
Notice that we can rearrange the factors like so:
So is .