The cube root of a number x is a value a such that a³ = x. In other words, you are looking for the number that, multiplied by itself three times, gives you x. Cube roots can be positive, negative, or zero, unlike square roots.
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Pro Tip
To estimate a cube root without a calculator, find the two perfect cubes the number falls between. For example, ∛50 is between ∛27=3 and ∛64=4, closer to 4.
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Did You Know?
Cube roots appear in physics when calculating the edge length of a cube from its volume, or the radius of a sphere from its volume (V = 4/3πr³ → r = ∛(3V/4π)).
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