$\"\"$

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The expression is $\"\"$ .

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The perfect squares closest to 17 are 16 and 25

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$\"\"$

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$\"\"$

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Since 17 is closer to 16, $\"\"$ . $\"\"$

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Another method

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Calculate the $\"\"$ value by using calculator

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$\"\"$ $\"\"$

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The perfect square of 17 nearest to $\"\"$ .