Compute the value of ${9.2}^{2} - {0.8}^{2}$

$86$

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$84$

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$88$

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$82$

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Solution

The correct option is B
$84$

The given expression is

${9.2}^{2} - {0.8}^{2}$ which can be written as

$= (9.2 + 0.8) (9.2 - 0.8)$

$= 10 \times 8.4$

$= 84$

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