Предмет: Алгебра, автор: тефтельсподливой

Решить квадратное ур-ие x^2+16x+28=0

Ответы

Автор ответа: danil9713

3

Д=16^2-4x1x28=256-112=144=12^2
x1=(-16+12)/2=-2
x2=(-16-12)/2=-14

Автор ответа: olya115153

1

x^2+16x+28=0
по теореме Виета:
x1+x2=-16
x1*x2=28
x1=-14
x2=-2
ответ: -14; -2

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