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x in (-oo:+oo)
((3*x^2)/2)*y = -2/3 // + -2/3
((3*x^2)/2)*y-(-2/3) = 0
((3*x^2)/2)*y+2/3 = 0
3/2*x^2*y = -2/3 // : 3/2*y
x^2 = -4/9*y^-1
x^2 = -4/9*y^-1 // ^ 1/2
abs(x) = (-4/9)^(1/2)*y^(-1/2)
x = (-4/9)^(1/2)*y^(-1/2) or x = -((-4/9)^(1/2)*y^(-1/2))
x in { (-4/9)^(1/2)*y^(-1/2), -((-4/9)^(1/2)*y^(-1/2)) }
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