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4*x^4-(2*x^3)+(1/3)*x^2 = 0
4*x^4-2*x^3+(1/3)*x^2 = 0
4*x^4-2*x^3+1/3*x^2 = 0
x^2*(4*x^2-2*x+1/3) = 0
4*x^2-2*x+1/3 = 0
DELTA = (-2)^2-(1/3*4*4)
DELTA = -4/3
DELTA < 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x = 0
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