Предмет: Алгебра, автор: cutiebeaytie

Решите уравнение 5х2 + 20х = 0
Решите уравнение: х2 – 3х – 4 = 0.

Ответы

Автор ответа: S666666S

0

Ответ:

1)

$5x(x + 4) = 0 \\ 5x = 0 \\ x = 0 \\ x + 4 = 0 \\ x = 0 - 4 \\ x = - 4$

2)D=b2-4ac=9+16=25

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