Question
1397 x 1397 = ?
Answer: Option A
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1397 x 1397 =`(1397)^2` = `(1400-3)^2` 1960006
= `(1400)^2` + `3^2` - 2 x 1400 x 3 = 1960000 + 9 - 8400 - 8400
= 1960009 - 8400 = 1951609. ---------------
1951609
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