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x in (-oo:+oo)
x*((2*x-8)/2)+2 = 0
(x*(2*x-8))/2+2 = 0
(x*(2*x-8))/2+(2^2)/2 = 0
x*(2*x-8)+4 = 0
2*x^2-8*x+4 = 0
2*x^2-8*x+4 = 0
2*(x^2-4*x+2) = 0
x^2-4*x+2 = 0
DELTA = (-4)^2-(1*2*4)
DELTA = 8
DELTA > 0
x = (8^(1/2)+4)/(1*2) or x = (4-8^(1/2))/(1*2)
x = (2*2^(1/2)+4)/2 or x = (4-2*2^(1/2))/2
2*(x-((4-2*2^(1/2))/2))*(x-((2*2^(1/2)+4)/2)) = 0
(2*(x-((4-2*2^(1/2))/2))*(x-((2*2^(1/2)+4)/2)))/2 = 0
(2*(x-((4-2*2^(1/2))/2))*(x-((2*2^(1/2)+4)/2)))/2 = 0 // * 2
2*(x-((4-2*2^(1/2))/2))*(x-((2*2^(1/2)+4)/2)) = 0
( x-((2*2^(1/2)+4)/2) )
x-((2*2^(1/2)+4)/2) = 0 // + (2*2^(1/2)+4)/2
x = (2*2^(1/2)+4)/2
( x-((4-2*2^(1/2))/2) )
x-((4-2*2^(1/2))/2) = 0 // + (4-2*2^(1/2))/2
x = (4-2*2^(1/2))/2
x in { (2*2^(1/2)+4)/2, (4-2*2^(1/2))/2 }
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