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(-3*x^3*y-((5/2)*y^2))*((-5/2)*y^2+3*x^3*y) = 0
((-5/2)*y^2-3*x^3*y)*((-5/2)*y^2+3*x^3*y) = 0
(-3*x^3*y-5/2*y^2)*(3*x^3*y-5/2*y^2) = 0
( -3*x^3*y-5/2*y^2 )
-3*x^3*y = -(-5/2*y^2) // : -3*y
x^3 = -5/6*y
x^3 = -5/6*y // ^ 1/3
x = -(5/6)^(1/3)*y^(1/3)
( 3*x^3*y-5/2*y^2 )
3*x^3*y = -(-5/2*y^2) // : 3*y
x^3 = 5/6*y
x^3 = 5/6*y // ^ 1/3
x = (5/6)^(1/3)*y^(1/3)
x in { -(5/6)^(1/3)*y^(1/3), (5/6)^(1/3)*y^(1/3) }
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