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8*x^2+9*(12/3)*x^2-7 = 0
44*x^2 = 7 // : 44
x^2 = 7/44
x^2 = 7/44 // ^ 1/2
abs(x) = (7/44)^(1/2)
x = (7/44)^(1/2) or x = -(7/44)^(1/2)
x in { (7/44)^(1/2), -(7/44)^(1/2) }
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