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x in (-oo:+oo)
((x+1)^1)/2-(((x+1)^3)/2) = 0
(x+1)/2-(((x+1)^3)/2) = 0
(x+1)/2+(-1*(x+1)^3)/2 = 0
x-1*(x+1)^3+1 = 0
-x^3-3*x^2-2*x = 0
-x^3-3*x^2-2*x = 0
-x*(x^2+3*x+2) = 0
x^2+3*x+2 = 0
DELTA = 3^2-(1*2*4)
DELTA = 1
DELTA > 0
x = (1^(1/2)-3)/(1*2) or x = (-1^(1/2)-3)/(1*2)
x = -1 or x = -2
-x*(x+2)*(x+1) = 0
(-x*(x+2)*(x+1))/2 = 0
(-x*(x+2)*(x+1))/2 = 0 // * 2
-x*(x+2)*(x+1) = 0
( -x )
-1*x = 0 // : -1
x = 0
( x+1 )
x+1 = 0 // - 1
x = -1
( x+2 )
x+2 = 0 // - 2
x = -2
x in { 0, -1, -2 }
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