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D( x )
4*x+2 = 0
4*x^2-1 = 0
4*x+2 = 0
4*x+2 = 0
4*x+2 = 0 // - 2
4*x = -2 // : 4
x = -2/4
x = -1/2
4*x^2-1 = 0
4*x^2-1 = 0
4*x^2 = 1 // : 4
x^2 = 1/4
x^2 = 1/4 // ^ 1/2
abs(x) = 1/2
x = 1/2 or x = -1/2
x in (-oo:-1/2) U (-1/2:1/2) U (1/2:+oo)
(6*x+25)/(4*x+2)-((6*x^2+x-2)/(4*x^2-1)) = 0
(6*x+25)/(4*x+2)+(-1*(6*x^2+x-2))/(4*x^2-1) = 0
((6*x+25)*(4*x^2-1))/((4*x+2)*(4*x^2-1))+(-1*(6*x^2+x-2)*(4*x+2))/((4*x+2)*(4*x^2-1)) = 0
(6*x+25)*(4*x^2-1)-1*(6*x^2+x-2)*(4*x+2) = 0
84*x^2-21 = 0
(84*x^2-21)/((4*x+2)*(4*x^2-1)) = 0
(84*x^2-21)/((4*x+2)*(4*x^2-1)) = 0 // * (4*x+2)*(4*x^2-1)
84*x^2-21 = 0
84*x^2 = 21 // : 84
x^2 = 1/4
x^2 = 1/4 // ^ 1/2
abs(x) = 1/2
x = 1/2 or x = -1/2
x in { 1/2}
x in { -1/2}
x belongs to the empty set
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