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h in (-oo:+oo)
(((2/3)*h^1)/3)*h+11 = 8 // - 8
(((2/3)*h^1)/3)*h-8+11 = 0
(((2/3)*h)/3)*h-8+11 = 0
2/9*h^2 = -3 // : 2/9
h^2 = -27/2
h belongs to the empty set
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