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x in (-oo:+oo)
x^2 = 11/6 // - 11/6
x^2-(11/6) = 0
x^2-11/6 = 0
1*x^2 = 11/6 // : 1
x^2 = 11/6
x^2 = 11/6 // ^ 1/2
abs(x) = (11/6)^(1/2)
x = (11/6)^(1/2) or x = -(11/6)^(1/2)
x in { (11/6)^(1/2), -(11/6)^(1/2) }
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