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x in (-oo:+oo)
(x^2)/3 = 8.75 // - 8.75
(x^2)/3-8.75 = 0
1/3*x^2 = 8.75 // : 1/3
x^2 = 26.25000026
x^2 = 26.25000026 // ^ 1/2
abs(x) = 26.25000026^(1/2)
x = 26.25000026^(1/2) or x = -26.25000026^(1/2)
x in { 26.25000026^(1/2), -26.25000026^(1/2) }
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