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x in (-oo:+oo)
12*x^3-(((16*x^2)/2)*x^2) = 0
12*x^3-8*x^4 = 0
12*x^3-8*x^4 = 0
4*x^3*(3-2*x) = 0
3-2*x = 0 // - 3
-2*x = -3 // : -2
x = -3/(-2)
x = 3/2
4*x^3 = 0
4*x^3 = 0 // : 4
x^3 = 0
x = 0
x in { 3/2, 0 }
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