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D( x )
6*x+3 = 0
x = 0
6*x+3 = 0
6*x+3 = 0
6*x+3 = 0 // - 3
6*x = -3 // : 6
x = -3/6
x = -1/2
x = 0
x = 0
x in (-oo:-1/2) U (-1/2:0) U (0:+oo)
(12*x-5)/(6*x+3) = 2-(8/x) // - 2-(8/x)
(12*x-5)/(6*x+3)+8/x-2 = 0
(x*(12*x-5))/(x*(6*x+3))+(8*(6*x+3))/(x*(6*x+3))+(-2*x*(6*x+3))/(x*(6*x+3)) = 0
x*(12*x-5)+8*(6*x+3)-2*x*(6*x+3) = 0
12*x^2-12*x^2+43*x-6*x+24 = 0
37*x+24 = 0
(37*x+24)/(x*(6*x+3)) = 0
(37*x+24)/(x*(6*x+3)) = 0 // * x*(6*x+3)
37*x+24 = 0
37*x+24 = 0 // - 24
37*x = -24 // : 37
x = -24/37
x = -24/37
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