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