Math, asked by abhinavrajesh2005, 1 year ago

using identities ,find 403*405

Answers

Answered by aaditya1149

24

$403 \times 405 = (404 - 1) \times (404 + 1)$
$403 \times 405 = {(404)}^{2} - {(1)}^{2}$
$because \: (a + b) \times (a -b ) = {a}^{2} - {b}^{2}$
$403 \times 405 = 163216 - 1$
$403 \times 405 = 163215$
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Answered by dheerajy30530

3

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