Here we will show you how to calculate the cube root of 8 minus the cube root of 21. In other words, we will calculate ∛8 - ∛21.
To calculate the cube root of 8 minus the cube root of 21, we will first take the cube root of each number and then find the difference. Here is the math and the answer:
∛8 = 2
∛21 ≈ 2.7589
2 - 2.7589 = -0.7589
∛8 - ∛21 ≈ -0.7589
For your convenience, we have also included the answer to the cube root of 8 minus the cube root of 21 in its simplest radical form:
2 - ∛21
Subtracting Cube Roots
Use the tool below to subtract another set of cube roots.
Cube root of 8 minus cube root of 22
Go here for another cube root subtraction problem that you may find interesting.