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Basically, we found that 6431 is the number whose cube is 64.
Similarly, 221 is the number whose square is 2, but this is exactly the definition of a square root!
You have probably seen a square root with radical (√) notation before but there are other kinds of roots! We typically write them in radical form as:
The radical notation for a square root is a shorthand since the square root is the most common root, but we can write square roots with the more general notation too:
Returning to our original example, now we can say:
We call this the cube root of 64, or the number whose cube is 64.