1.

1397 x 1397 = ?

Answer»

1397 x 1397 = ?
CHOOSE the correct option from below list
(1)1951609
(2)1981709
(3)18362619
(4)2031719
(5)None of these

Answer:-(1)1951609
Note:-(1397)2
= (1400 - 3)2
= (1400)2 + (3)2 - (2 x 1400 x 3)
= 1960000 + 9 - 8400
= 1960009 - 8400
= 1951609


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