Ответ:
1521
Объяснение:
(39)² = (40 - 1)² = 1600 - 2*40*1 + 1 = 1600 - 80 + 1 = 1521
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Verified answer
Ответ:
1521
Объяснение:
(39)² = (40 - 1)² = 1600 - 2*40*1 + 1 = 1600 - 80 + 1 = 1521