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x in (-oo:+oo)
x*(((1/2)*(4*x-10))/5)-11 = 0
(1/2*x*(4*x-10))/5-11 = 0
(1/2*x*(4*x-10))/5+(-11*5)/5 = 0
1/2*x*(4*x-10)-11*5 = 0
2*x^2-5*x-55 = 0
2*x^2-5*x-55 = 0
2*x^2-5*x-55 = 0
DELTA = (-5)^2-(-55*2*4)
DELTA = 465
DELTA > 0
x = (465^(1/2)+5)/(2*2) or x = (5-465^(1/2))/(2*2)
x = (465^(1/2)+5)/4 or x = (5-465^(1/2))/4
(x-((5-465^(1/2))/4))*(x-((465^(1/2)+5)/4)) = 0
((x-((5-465^(1/2))/4))*(x-((465^(1/2)+5)/4)))/5 = 0
((x-((5-465^(1/2))/4))*(x-((465^(1/2)+5)/4)))/5 = 0 // * 5
(x-((5-465^(1/2))/4))*(x-((465^(1/2)+5)/4)) = 0
( x-((465^(1/2)+5)/4) )
x-((465^(1/2)+5)/4) = 0 // + (465^(1/2)+5)/4
x = (465^(1/2)+5)/4
( x-((5-465^(1/2))/4) )
x-((5-465^(1/2))/4) = 0 // + (5-465^(1/2))/4
x = (5-465^(1/2))/4
x in { (465^(1/2)+5)/4, (5-465^(1/2))/4 }
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