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x in (-oo:+oo)
2*(3*x-9) = (6*x-(18/2))^2 // - (6*x-(18/2))^2
2*(3*x-9)-(6*x-(18/2))^2 = 0
2*(3*x-9)-(6*x-9)^2 = 0
2*(3*x-9)-1*(6*x-9)^2 = 0
2*(3*x-9)-1*(6*x-9)^2 = 0
114*x-36*x^2-99 = 0
114*x-36*x^2-99 = 0
3*(38*x-12*x^2-33) = 0
38*x-12*x^2-33 = 0
DELTA = 38^2-(-33*(-12)*4)
DELTA = -140
DELTA < 0
3 = 0
3 = 0
x belongs to the empty set
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