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D( x )
2*x-1 = 0
2*x-1 = 0
2*x-1 = 0
2*x-1 = 0 // + 1
2*x = 1 // : 2
x = 1/2
x in (-oo:1/2) U (1/2:+oo)
(4*x^2-(3*x)-11)/(2*x-1) = 0
(4*x^2-3*x-11)/(2*x-1) = 0
4*x^2-3*x-11 = 0
4*x^2-3*x-11 = 0
DELTA = (-3)^2-(-11*4*4)
DELTA = 185
DELTA > 0
x = (185^(1/2)+3)/(2*4) or x = (3-185^(1/2))/(2*4)
x = (185^(1/2)+3)/8 or x = (3-185^(1/2))/8
(x-((3-185^(1/2))/8))*(x-((185^(1/2)+3)/8)) = 0
((x-((3-185^(1/2))/8))*(x-((185^(1/2)+3)/8)))/(2*x-1) = 0
( x-((185^(1/2)+3)/8) )
x-((185^(1/2)+3)/8) = 0 // + (185^(1/2)+3)/8
x = (185^(1/2)+3)/8
( x-((3-185^(1/2))/8) )
x-((3-185^(1/2))/8) = 0 // + (3-185^(1/2))/8
x = (3-185^(1/2))/8
x in { (185^(1/2)+3)/8, (3-185^(1/2))/8 }
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