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x in (-oo:+oo)
x*((4*x-1)/3) = 8 // - 8
x*((4*x-1)/3)-8 = 0
(x*(4*x-1))/3-8 = 0
(x*(4*x-1))/3+(-8*3)/3 = 0
x*(4*x-1)-8*3 = 0
4*x^2-x-24 = 0
4*x^2-x-24 = 0
4*x^2-x-24 = 0
DELTA = (-1)^2-(-24*4*4)
DELTA = 385
DELTA > 0
x = (385^(1/2)+1)/(2*4) or x = (1-385^(1/2))/(2*4)
x = (385^(1/2)+1)/8 or x = (1-385^(1/2))/8
(x-((1-385^(1/2))/8))*(x-((385^(1/2)+1)/8)) = 0
((x-((1-385^(1/2))/8))*(x-((385^(1/2)+1)/8)))/3 = 0
((x-((1-385^(1/2))/8))*(x-((385^(1/2)+1)/8)))/3 = 0 // * 3
(x-((1-385^(1/2))/8))*(x-((385^(1/2)+1)/8)) = 0
( x-((1-385^(1/2))/8) )
x-((1-385^(1/2))/8) = 0 // + (1-385^(1/2))/8
x = (1-385^(1/2))/8
( x-((385^(1/2)+1)/8) )
x-((385^(1/2)+1)/8) = 0 // + (385^(1/2)+1)/8
x = (385^(1/2)+1)/8
x in { (1-385^(1/2))/8, (385^(1/2)+1)/8 }
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