|(x^3-3x+2)/(2x+1)|=|(x-1)^2||(x+2)/(2x+1)|
x=1
x=0
x=-1
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**
**
**
**
**
(x^3-3x+2) / (2x+1) = (x+2) (x-1)^2 /(2x+1)
x=1
x=0
x=-1
X=-2
**
**
**
(x^3-3x+2) / (2x+1) = (x+2) (x-1)^2 /(2x+1)
x=1
x=0
x=-1
X=-2
x=4
x=-5
x=-14
x=13
abc
ca^2+ab^2+bc^2=3abc
AM-GM
ca^2+ab^2+bc^2 >= 3abc
a=b=c
: 1 (0 1 )
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