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D( x )
2*x+4 = 0
4*x+8 = 0
2*x+4 = 0
2*x+4 = 0
2*x+4 = 0 // - 4
2*x = -4 // : 2
x = -4/2
x = -2
4*x+8 = 0
4*x+8 = 0
4*x+8 = 0 // - 8
4*x = -8 // : 4
x = -8/4
x = -2
x in (-oo:-2) U (-2:+oo)
(3*x)/(4*x+8)-((x+5)/(2*x+4)) = 1 // - 1
(3*x)/(4*x+8)-((x+5)/(2*x+4))-1 = 0
(3*x)/(4*x+8)+(-1*(x+5))/(2*x+4)-1 = 0
(3*x*(2*x+4))/((4*x+8)*(2*x+4))+(-1*(x+5)*(4*x+8))/((4*x+8)*(2*x+4))+(-1*(4*x+8)*(2*x+4))/((4*x+8)*(2*x+4)) = 0
3*x*(2*x+4)-1*(x+5)*(4*x+8)-1*(4*x+8)*(2*x+4) = 0
2*x^2-8*x^2-16*x-32*x-40-32 = 0
-6*x^2-48*x-72 = 0
-6*x^2-48*x-72 = 0
-6*(x^2+8*x+12) = 0
x^2+8*x+12 = 0
DELTA = 8^2-(1*4*12)
DELTA = 16
DELTA > 0
x = (16^(1/2)-8)/(1*2) or x = (-16^(1/2)-8)/(1*2)
x = -2 or x = -6
-6*(x+6)*(x+2) = 0
(-6*(x+6)*(x+2))/((4*x+8)*(2*x+4)) = 0
(-6*(x+6)*(x+2))/((4*x+8)*(2*x+4)) = 0 // * (4*x+8)*(2*x+4)
-6*(x+6)*(x+2) = 0
( x+2 )
x+2 = 0 // - 2
x = -2
( x+6 )
x+6 = 0 // - 6
x = -6
x in { -2}
x = -6
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