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x in (-oo:+oo)
4*(x^2-5)-(7/3)+6 = 9 // - 9
4*(x^2-5)-(7/3)-9+6 = 0
4*(x^2-5)-7/3-9+6 = 0
(3*4*(x^2-5))/3-7/3+(-9*3)/3+(3*6)/3 = 0
3*4*(x^2-5)-9*3+3*6-7 = 0
12*x^2-67-27+18 = 0
12*x^2-94+18 = 0
12*x^2-76 = 0
(12*x^2-76)/3 = 0
(12*x^2-76)/3 = 0 // * 3
12*x^2-76 = 0
12*x^2 = 76 // : 12
x^2 = 19/3
x^2 = 19/3 // ^ 1/2
abs(x) = (19/3)^(1/2)
x = (19/3)^(1/2) or x = -(19/3)^(1/2)
x in { (19/3)^(1/2), -(19/3)^(1/2) }
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