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x in (-oo:+oo)
((6*(x+7))/17)*(x-4) = 1 // - 1
((6*(x+7))/17)*(x-4)-1 = 0
(6*(x+7)*(x-4))/17-1 = 0
(6*(x+7)*(x-4))/17+(-1*17)/17 = 0
6*(x+7)*(x-4)-1*17 = 0
6*x^2+18*x-185 = 0
6*x^2+18*x-185 = 0
6*x^2+18*x-185 = 0
DELTA = 18^2-(-185*4*6)
DELTA = 4764
DELTA > 0
x = (4764^(1/2)-18)/(2*6) or x = (-4764^(1/2)-18)/(2*6)
x = (2*1191^(1/2)-18)/12 or x = (-2*1191^(1/2)-18)/12
(x-((-2*1191^(1/2)-18)/12))*(x-((2*1191^(1/2)-18)/12)) = 0
((x-((-2*1191^(1/2)-18)/12))*(x-((2*1191^(1/2)-18)/12)))/17 = 0
((x-((-2*1191^(1/2)-18)/12))*(x-((2*1191^(1/2)-18)/12)))/17 = 0 // * 17
(x-((-2*1191^(1/2)-18)/12))*(x-((2*1191^(1/2)-18)/12)) = 0
( x-((-2*1191^(1/2)-18)/12) )
x-((-2*1191^(1/2)-18)/12) = 0 // + (-2*1191^(1/2)-18)/12
x = (-2*1191^(1/2)-18)/12
( x-((2*1191^(1/2)-18)/12) )
x-((2*1191^(1/2)-18)/12) = 0 // + (2*1191^(1/2)-18)/12
x = (2*1191^(1/2)-18)/12
x in { (-2*1191^(1/2)-18)/12, (2*1191^(1/2)-18)/12 }
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