The expression is .
The perfect squares closest to 242 are 225 and 256
Since 242 is closer to 16, .
Another method
Calculate the value by using calculator
The perfect square of 242 nearest to 16.
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value by using calculator![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=2e91afbd32f978f4cf2e52f425707449.png\")
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