1904 x 1904 = ?
3654316
3632646
3625216
3623436
Explanation:
1904 x 1904= (1904)2
= (1900 + 4)2
= (1900)2 + (4)2 + $\left(2 \times 1900 \times 4\right)$
= 3610000 + 16 + 15200.= 3625216.
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