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x in (-oo:+oo)
y = x^2-(37/4) // - x^2-(37/4)
y-x^2+37/4 = 0
-1*x^2 = -(y+37/4) // : -1
x^2 = y+37/4
x^2 = y+37/4 // ^ 1/2
abs(x) = (y+37/4)^(1/2)
x = (y+37/4)^(1/2) or x = -(y+37/4)^(1/2)
x in { (y+37/4)^(1/2), -(y+37/4)^(1/2) }
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