Решение:
7 2/5 - (2/5)^2 = 37/5 - 4/25 = 185/25 - 4/25 = 181/25 = 7 6/25 = 7,24.
Ответ: 7,24.
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Решение:
7 2/5 - (2/5)^2 = 37/5 - 4/25 = 185/25 - 4/25 = 181/25 = 7 6/25 = 7,24.
Ответ: 7,24.