Предмет: Алгебра, автор: vereya



-x^2-2x +8=0

Уравнение!

Ответы

Автор ответа: Neznaika532
0

-x^2-2x +8=0

D = 4 - 4×(-1)×8 = 4 + 32 = 36>0

x1 = 2+6 / 2×(-1) = 8 / -2 = -4

x2 = 2-6 / 2×(-1) = -4 / -2 = 2

Ответ: -4; 2.

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