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x in (-oo:+oo)
x*x+6*x-x+7/4-1 = 11*x+2/6 // - 11*x+2/6
x*x+6*x-x-(11*x)+7/4-(2/6)-1 = 0
x*x+6*x-x-11*x+7/4-1/3-1 = 0
x^2-6*x+5/12 = 0
DELTA = (-6)^2-(5/12*1*4)
DELTA = 103/3
DELTA > 0
x = ((103/3)^(1/2)+6)/(1*2) or x = (6-(103/3)^(1/2))/(1*2)
x = ((103/3)^(1/2)+6)/2 or x = (6-(103/3)^(1/2))/2
x in { (6-(103/3)^(1/2))/2, ((103/3)^(1/2)+6)/2 }
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