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(1/3)*x^3-((3/2)*x^2) = 0
(1/3)*x^3+(-3/2)*x^2 = 0
1/3*x^3-3/2*x^2 = 0
x^2*(1/3*x-3/2) = 0
1/3*x-3/2 = 0 // + 3/2
1/3*x = 3/2 // : 1/3
x = 3/2/1/3
x = 9/2
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in { 9/2, 0 }
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