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X in (-oo:+oo)
X^2-(144/13) = 0
X^2-144/13 = 0
1*X^2 = 144/13 // : 1
X^2 = 144/13
X^2 = 144/13 // ^ 1/2
abs(X) = (144/13)^(1/2)
X = (144/13)^(1/2) or X = -(144/13)^(1/2)
X in { (144/13)^(1/2), -(144/13)^(1/2) }
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