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x in (-oo:+oo)
6*x^2-(((3*x)/3)*x^3) = 0
6*x^2-x^4 = 0
t_1 = x^2
6*t_1^1-1*t_1^2 = 0
6*t_1-t_1^2 = 0
DELTA = 6^2-(-1*0*4)
DELTA = 36
DELTA > 0
t_1 = (36^(1/2)-6)/(-1*2) or t_1 = (-36^(1/2)-6)/(-1*2)
t_1 = 0 or t_1 = 6
t_1 = 0
x^2+0 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
t_1 = 6
x^2-6 = 0
1*x^2 = 6 // : 1
x^2 = 6
x^2 = 6 // ^ 1/2
abs(x) = 6^(1/2)
x = 6^(1/2) or x = -6^(1/2)
x in { 0, 6^(1/2), -6^(1/2) }
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