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Swetta2013
@Swetta2013
July 2022
1
19
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Найдите значение выражения
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nikolson93
20ab - 5(-2a-b)² =
20ab - 5 (4a² + 4ab + b²) = 20ab - 20a² - 20ab - 5b² = -20a² - 5b² = -5 (4a² + b²) = - 5 (4*6 + 14) = - 5* (24+14) = -5*38 = -190
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