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X in (-oo:+oo)
(X^2)/3-((7^1)/3) = 30 // - 30
(X^2)/3-((7^1)/3)-30 = 0
(X^2)/3-7/3-30 = 0
1/3*X^2 = 97/3 // : 1/3
X^2 = 97
X^2 = 97 // ^ 1/2
abs(X) = 97^(1/2)
X = 97^(1/2) or X = -97^(1/2)
X in { 97^(1/2), -97^(1/2) }
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