Solve: $(82)^{2} - (18)^{2}$

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Solution

We know that $a^{2} - b^{2} = (a - b) (a + b)$
$82^{2} - 18^{2}$
$= (82 - 18) (82 + 18)$
$= 74 \times 100 = 7400$

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Similar questions

$(82)^{2} - (18)^{2} = ?$
(a) $8218$
(b) $6418$
(c) $6400$
(d) $7204$

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