Short Answer

Radical Expression Evaluation in Technical Documentation

A junior analyst is reviewing a technical manual that lists the following radical expressions as part of a temperature variance model:

  1. 643\sqrt[3]{-64}
  2. 164\sqrt[4]{-16}
  3. 2435\sqrt[5]{-243}

Based on the rules for higher roots of negative numbers, identify which of these expressions does not result in a real number and state the evaluated real number values for the remaining two expressions.

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Updated 2026-04-17

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