Explain what the radicand and index of a radical number are. Write a cube root expression that involves a whole number and a variable, and identify the radicand and index.

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In a radical expression, the radicand is the number underneath the radical symbol (√) and the index is the number above the radical symbol.

For example, in the expression: ∛(8x), the 8x is the radicand and the index is 3. The cube root of 8x is being taken, which means finding the number that, when multiplied by itself three times, equals 8x.
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