Предмет: Алгебра, автор: AnnaGagarina5245

Знайти кількість коренів квадратного тричлена 3х2 + 6х +8.

Ответы

Автор ответа: asalkhan

3×2+6х+8

6+6х+8

6х=14

х=14/6

3x2+6x+8

6x+6x+8

12x+8=4(3x+2)

Автор ответа: matilda17562

Ответ:
уравнение корней не имеет.
Объяснение:
3х² + 6х + 8 = 0
Число корней квадратного уравнения зависит от знака дискриминанта.
Если D > 0, уравнение имеет два различных корня.
Если D = 0, уравнение имеет один корень.
Если D < 0, уравнение корней не имеет.
В нашем случае
а = 3; b = 6; c = 8.
D = b² - 4ac = 6² - 4•3•8 = 36 - 96 = -60,
D < 0, уравнение корней не имеет.

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