Here we will show you how to calculate the cube root of 20 plus the cube root of 30. In other words, we will calculate ∛20 + ∛30.
It is tempting to simply add 20 and 30 together and then take the cube root of the sum. However, that will give you the wrong answer. Instead, you have to first take the cube root of each number and then add them together, like this:
∛20 ≈ 2.7144
∛30 ≈ 3.1072
2.7144 + 3.1072 = 5.8216
∛20 + ∛30 ≈ 5.8216
For your convenience, we have also included the answer to the cube root of 20 plus the cube root of 30 in its simplest radical form:
∛20 + ∛30
Adding Cube Roots
Use the tool below to add another set of cube roots.
Cube root of 20 plus cube root of 31
Here is another cube root addition problem you may find interesting.