Предмет: Алгебра, автор: annagrishchenko

Решите уравнение х²+4х-7=0

Ответы

Автор ответа: Kristya196

$x^{2} + 4x - 7 = 0$
D = 16 + 28 = 44
x₁ = (-4-√44)/2 = (-4-2√11)/2 = -2(2+√11)/2 = -2-√11
x₂ = (-4+√44)/2 = (-4+2√11)/2 = -2(2-√11)/2 = -2+√11
Ответ: -2-√11; -2+√11

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