Предмет: Алгебра, автор: louser2

туристы взяли на прокат лодку.за 3 ч они поднялись вверх по реке на 12 км и вернулись обратно. какова скорость лодки в стоячей воде если скорость течения 2 км/ч

Ответы

Автор ответа: Гоша68

12/(x+2)+12/(x-2)=3

8x=x^2-4

x^2-8x-4=0

x=4+2sqrt(5)

странное значение, но факт, может ошибка в условии

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