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Key Concept
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Square root
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Square Root of a Number: If b² =a, then b is a square root of a.
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$\"\"$

The expression is $\"\"$ .

Radicand is 361.

$\"\"$ (The positive square root of radicand: $\"\"$ ) $\"\"$

The value of the expression is 19.

\ Key Concept \	\ Square root \
\ Square Root of a Number: If b² =a, then b is a square root of a. \