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D( x )
4*x-2 = 0
4*x-2 = 0
4*x-2 = 0
4*x-2 = 0 // + 2
4*x = 2 // : 4
x = 2/4
x = 1/2
x in (-oo:1/2) U (1/2:+oo)
x = (3*x-12)/(4*x-2) // - (3*x-12)/(4*x-2)
x-((3*x-12)/(4*x-2)) = 0
(-1*(3*x-12))/(4*x-2)+x = 0
(-1*(3*x-12))/(4*x-2)+(x*(4*x-2))/(4*x-2) = 0
x*(4*x-2)-1*(3*x-12) = 0
4*x^2-5*x+12 = 0
4*x^2-5*x+12 = 0
4*x^2-5*x+12 = 0
DELTA = (-5)^2-(4*4*12)
DELTA = -167
DELTA < 0
1 = 0
1/(4*x-2) = 0
1/(4*x-2) = 0 // * 4*x-2
1 = 0
x belongs to the empty set
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