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Правда или ложь: квадратные уравнения

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Правда или ложь: квадратные уравнения

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Задачи по квадратным уравнениям

Created by

Элнур Хайдаров
Элнур Хайдаров
Kazakhstan

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Правда или ложь: квадратные уравнения
 

Правда или ложь: квадратные уравненияOnline version

Задачи по квадратным уравнениям

by Элнур Хайдаров
1

Две разные корни всегда отсутствуют у квадратного уравнения.

2

Если D=0, уравнение имеет один повторяющийся корень x=-b/(2a).

3

Для квадратного уравнения ax^2+bx+c=0 дискриминант D равен b^2-4ac.

4

Дискриминант квадратно уравнения равен b^2+4ac.

5

Если c=0, уравнение ax^2+bx имеет только один корень x=0.

6

Если D>0, уравнение имеет два различных корня.

7

При a=0 формула корней всё ещё применяется для квадратного уравнения.

8

Если D<0, корни квадратного уравнения комплексные.

9

При D<0 уравнение имеет два действительных корня.

10

Формула корней x=(-b±√D)/(2a) применима при a≠0.

 
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