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((2*x^2)/4)*x^3-(16*x) = 0
((2*x^2)/4)*x^3-16*x = 0
1/2*x^5-16*x = 0
x*(1/2*x^4-16) = 0
1/2*x^4 = 16 // : 1/2
x^4 = 32
x^4 = 32 // ^ 1/4
abs(x) = 2*2^(1/4)
x = 2*2^(1/4) or x = -(2*2^(1/4))
x = 0
x = 0
x in { 2*2^(1/4), -(2*2^(1/4)), 0 }
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