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oksanapolyakovа
@oksanapolyakovа
July 2022
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Разложите квадратный трёхчлен 3x^2+5x+2 на линейные множители.
1) (x-1)(3x+2)
2) (x+1)(3x+2)
3) (x-1)(3x-2)
4) (x-1)(3x-2)
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kalbim
Verified answer
3x^2 + 5x + 2 = 3*(x - x1)(x - x2) = 3*(x + 2/3)(x + 1) = (3x + 2)(x + 1)
D=25 - 4*2*3 = 1
x1 = (-5 + 1)/6 = -4/6 = -2/3
x2 = (-5 - 1)/6 = -6/6 = -1
Правильный вариант ответа 2)
1 votes
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Answers & Comments
Verified answer
3x^2 + 5x + 2 = 3*(x - x1)(x - x2) = 3*(x + 2/3)(x + 1) = (3x + 2)(x + 1)D=25 - 4*2*3 = 1
x1 = (-5 + 1)/6 = -4/6 = -2/3
x2 = (-5 - 1)/6 = -6/6 = -1
Правильный вариант ответа 2)