What is cube root

The symbol for a cube root is $\sqrt[3]{}$.

For example, the cube root of 8 is 2 because $2 \times 2 \times 2 = 8$. So, $\sqrt[3]{8} = 2$.

Similarly, the cube root of -27 is -3 because $(-3) \times (-3) \times (-3) = -27$. So, $\sqrt[3]{-27} = -3$.