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dotaplayer
@dotaplayer
August 2022
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Решите уравнение:
2x^3-x^2-18x+9=0
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Answers & Comments
denkenobi
X=0,5
x=3
x=-3 вот корни уравнения
5 votes
Thanks 3
pocchtaa
2x³-x²-18x+9=0
(2
x³-18x
)+(-x²+9)=0
2x(x²-9)-(x²-9)=0
(x²-9)(2x-1)=0
(x-3)(x+3)(2x-1)=0
Произведение будет равно нулю, когда один из множителей равен нулю.
x-3=0 x+3=0 2x-1=0
x=3 x=-3 2x=1
x=
8 votes
Thanks 5
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Answers & Comments
x=3
x=-3 вот корни уравнения
(2x³-18x)+(-x²+9)=0
2x(x²-9)-(x²-9)=0
(x²-9)(2x-1)=0
(x-3)(x+3)(2x-1)=0
Произведение будет равно нулю, когда один из множителей равен нулю.
x-3=0 x+3=0 2x-1=0
x=3 x=-3 2x=1
x=