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D( x )
2*x-12 = 0
2*x-12 = 0
2*x-12 = 0
2*x-12 = 0 // + 12
2*x = 12 // : 2
x = 12/2
x = 6
x in (-oo:6) U (6:+oo)
2/(2*x-12)+2*x = 0
2/(2*x-12)+(2*x*(2*x-12))/(2*x-12) = 0
2*x*(2*x-12)+2 = 0
4*x^2-24*x+2 = 0
4*x^2-24*x+2 = 0
2*(2*x^2-12*x+1) = 0
2*x^2-12*x+1 = 0
DELTA = (-12)^2-(1*2*4)
DELTA = 136
DELTA > 0
x = (136^(1/2)+12)/(2*2) or x = (12-136^(1/2))/(2*2)
x = (2*34^(1/2)+12)/4 or x = (12-2*34^(1/2))/4
2*(x-((12-2*34^(1/2))/4))*(x-((2*34^(1/2)+12)/4)) = 0
(2*(x-((12-2*34^(1/2))/4))*(x-((2*34^(1/2)+12)/4)))/(2*x-12) = 0
(2*(x-((12-2*34^(1/2))/4))*(x-((2*34^(1/2)+12)/4)))/(2*x-12) = 0 // * 2*x-12
2*(x-((12-2*34^(1/2))/4))*(x-((2*34^(1/2)+12)/4)) = 0
( x-((12-2*34^(1/2))/4) )
x-((12-2*34^(1/2))/4) = 0 // + (12-2*34^(1/2))/4
x = (12-2*34^(1/2))/4
( x-((2*34^(1/2)+12)/4) )
x-((2*34^(1/2)+12)/4) = 0 // + (2*34^(1/2)+12)/4
x = (2*34^(1/2)+12)/4
x in { (12-2*34^(1/2))/4, (2*34^(1/2)+12)/4 }
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