Предмет: Алгебра, автор: nsjdhanjdbdjehdnsjw9

решите неравенство (х+1)(х-2)(2х+5)>=0​

Ответы

Автор ответа: mmb1
1

Метод интервалов

(х+1)(х-2)(2х+5)>=0​

Ищем корни  (х+1)(х-2)(2х+5)=0

x = -1

x = 2

x = -2.5

Рисуем точки на цифровой оси и рисуем интервалы

-----------------[-2.5] +++++++++ [-1] --------------- [2] ++++++++++

​x ∈ [-2.5, -1] U [2, +∞)

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