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(1/3)*x^3+0.5*x^2-(2*x) = 0
(1/3)*x^3+0.5*x^2-2*x = 0
1/3*x^3+0.5*x^2-2*x = 0
x*(1/3*x^2+0.5*x-2) = 0
1/3*x^2+0.5*x-2 = 0
DELTA = 0.5^2-(-2*1/3*4)
DELTA = 0.5^2+8/3
DELTA = 2.91666667
DELTA > 0
x = ((0.5^2+8/3)^(1/2)-0.5)/(1/3*2) or x = (-(0.5^2+8/3)^(1/2)-0.5)/(1/3*2)
x = 3/2*((0.5^2+8/3)^(1/2)-0.5) or x = -3/2*((0.5^2+8/3)^(1/2)+0.5)
x = 0
x = 0
x in { -3/2*((0.5^2+8/3)^(1/2)+0.5), 3/2*((0.5^2+8/3)^(1/2)-0.5), 0 }
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