Find $(121)^{2}$ .

13100

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12200

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12100

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12300

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Solution

The correct option is C
12100

$121 - 100 = 21$
$121 + 21 = 142$
$(121 - 100)^{2} = 441$

$121^{2} = 14200 + 441 = 14641$

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