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D( x )
4*x-1 = 0
3*x+7 = 0
4*x-1 = 0
4*x-1 = 0
4*x-1 = 0 // + 1
4*x = 1 // : 4
x = 1/4
3*x+7 = 0
3*x+7 = 0
3*x+7 = 0 // - 7
3*x = -7 // : 3
x = -7/3
x in (-oo:-7/3) U (-7/3:1/4) U (1/4:+oo)
(2*x-3)/(3*x+7)+6/(4*x-1) = 0
((2*x-3)*(4*x-1))/((3*x+7)*(4*x-1))+(6*(3*x+7))/((3*x+7)*(4*x-1)) = 0
(2*x-3)*(4*x-1)+6*(3*x+7) = 0
8*x^2+4*x+45 = 0
8*x^2+4*x+45 = 0
8*x^2+4*x+45 = 0
DELTA = 4^2-(4*8*45)
DELTA = -1424
DELTA < 0
1 = 0
1/((3*x+7)*(4*x-1)) = 0
1/((3*x+7)*(4*x-1)) = 0 // * (3*x+7)*(4*x-1)
1 = 0
x belongs to the empty set
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