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x in (-oo:+oo)
(x-3)*(x+2) = 3*x+28/3 // - 3*x+28/3
(x-3)*(x+2)-(3*x)-(28/3) = 0
(x-3)*(x+2)-3*x-28/3 = 0
(3*(x-3)*(x+2))/3+(-3*3*x)/3-28/3 = 0
3*(x-3)*(x+2)-3*3*x-28 = 0
3*x^2-12*x-28-18 = 0
3*x^2-12*x-46 = 0
3*x^2-12*x-46 = 0
3*x^2-12*x-46 = 0
DELTA = (-12)^2-(-46*3*4)
DELTA = 696
DELTA > 0
x = (696^(1/2)+12)/(2*3) or x = (12-696^(1/2))/(2*3)
x = (2*174^(1/2)+12)/6 or x = (12-2*174^(1/2))/6
(x-((12-2*174^(1/2))/6))*(x-((2*174^(1/2)+12)/6)) = 0
((x-((12-2*174^(1/2))/6))*(x-((2*174^(1/2)+12)/6)))/3 = 0
((x-((12-2*174^(1/2))/6))*(x-((2*174^(1/2)+12)/6)))/3 = 0 // * 3
(x-((12-2*174^(1/2))/6))*(x-((2*174^(1/2)+12)/6)) = 0
( x-((12-2*174^(1/2))/6) )
x-((12-2*174^(1/2))/6) = 0 // + (12-2*174^(1/2))/6
x = (12-2*174^(1/2))/6
( x-((2*174^(1/2)+12)/6) )
x-((2*174^(1/2)+12)/6) = 0 // + (2*174^(1/2)+12)/6
x = (2*174^(1/2)+12)/6
x in { (12-2*174^(1/2))/6, (2*174^(1/2)+12)/6 }
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