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vaybay
@vaybay
July 2022
1
8
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Помогите решить
6x+9+ 3x-1(x-2)=2x+1(x+2)
(Изначально было 6x+9/x^2-4+ 3x-1/x+2=2x+1/x-2)
Дискриминант получается 36-28=8,а по логике должно 36+28=64
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strong5
Verified answer
6x+9/x²-4+ 3x-1/x+2=2x+1/x-2
6x+9/x²-4+ 3x-1/x+2-2x+1/x-2=0
ОДЗ: х≠±2
6х+9+(3х-1)(х-2)-(х+2)(2х+1)=0
6х+9+3х²-6х-х+2-(2х²+х+4х+2)=0
9+3х²-х+2-2х²-х-4х-2=0
х²-6х+9=0
(x-3)²=0
x=3
Ответ:3
1 votes
Thanks 2
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Answers & Comments
Verified answer
6x+9/x²-4+ 3x-1/x+2=2x+1/x-26x+9/x²-4+ 3x-1/x+2-2x+1/x-2=0
ОДЗ: х≠±2
6х+9+(3х-1)(х-2)-(х+2)(2х+1)=0
6х+9+3х²-6х-х+2-(2х²+х+4х+2)=0
9+3х²-х+2-2х²-х-4х-2=0
х²-6х+9=0
(x-3)²=0
x=3
Ответ:3