Предмет: Алгебра, автор: Ksuha110305

#21. Решите неравенство

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Ответы

Автор ответа: Аноним

1

решение во вложении…….

Приложения:

Автор ответа: larisapuh

2

решаем через дискриминант
x^2-4x-21
D=16+84=100
корень из D=10
X1,X2=4+-D/2=7;-3

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