In a radical expression, the radicand is the number inside the radical, the index is the degree of the radical, such as "2" or "3", which would indicate a square or cube root, and the radical is the symbol. Some calculators may have a cube root key. The key looks similar to a square root key but with a "3" out in front of the radical. If your graphing calculator does not have this key, use the alternative method described below.

Enter the radicand (the number that you will be taking the root of) into the calculator.

Press the "^" key or whatever your calculator uses to raise a number to a power.

Type "(1/3)" using the parentheses to make sure the calculator has the correct power, and press the "Enter" or "=" key (depending on your calculator). Raising the radicand to the 1/3 power is the same as taking the cube root.