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NKLCHKN
@NKLCHKN
August 2022
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Помогите пожалуйста
у^3 + 4у^2 + 6у + 4 = 0
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Удачник66
Verified answer
Y^3 + 4y^2 + 6y + 4 = 0
y^3 + 2y^2 + 2y^2 + 4y + 2y + 4 = 0
(y + 2)(y^2 + 2y + 2) = 0
y = -2
Квадратное уравнение во второй скобке
y^2 + 2y + 2 = 0
D = 2^2 - 4*2 = 4 - 8 = -4 < 0
Корней нет.
Ответ: -2
1 votes
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Answers & Comments
Verified answer
Y^3 + 4y^2 + 6y + 4 = 0y^3 + 2y^2 + 2y^2 + 4y + 2y + 4 = 0
(y + 2)(y^2 + 2y + 2) = 0
y = -2
Квадратное уравнение во второй скобке
y^2 + 2y + 2 = 0
D = 2^2 - 4*2 = 4 - 8 = -4 < 0
Корней нет.
Ответ: -2