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Автор - 16j

1)х²-4х-12=0

2)z²+4z-12=0

Ответ

Проверено экспертом

Автор - bel72777

Объяснение:

х^2 -4х-12=0

D=16+48=64

x1=(4-8)/2=-4/2=-2

x2=(4+8)/2=12/2=6

z^2 +4z-12=0

D=16+48=64

z1=(-4-8)/2=-12/2=-6

z2=(-4+8)/2=4/2=2

Ответ

Проверено экспертом

Автор - mefody66

Ответ:

Объяснение:

1) x^2 - 4x - 12 = 0

(x - 6)(x + 2) = 0

x1 = - 2; x2 = 6

2) z^2 + 4z - 12 = 0

(z + 6)(z - 2) = 0

z1 = - 6; z2 = 2

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