SOLUTION: what is radical expression

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Question 168524This question is from textbook SpringBoard
: what is radical expression This question is from textbook SpringBoard

Answer by SAT Math Tutor(36) About Me  (Show Source):
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A radical is just a square root. Here are some examples of radical expressions:
sqrt%28x%29
sqrt%289%29
sqrt%284x%29
sqrt%289y%5E2%2A16x%5E4%29