3. [2 балла] Используя теорему Вьетнама, постройте квадратное уравнение: x = -7, x, = 2
А) х2 + 14х +5 = 0
Б) -х2 - 5х - 14 = 0
В) х2 - 5х + 14 = 0
Г) х2 + 5х - 14 = 0
Д) х2 - 14х + 5 = 0
4. Найдите корни уравнения 2u2 - 7y + 6 = 0.
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