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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
6/x+3 = (4/3)*x-7 // - (4/3)*x-7
6/x-((4/3)*x)+3+7 = 0
(-4/3)*x+6/x+3+7 = 0
6*x^-1-4/3*x^1+10*x^0 = 0
(10*x^1-4/3*x^2+6*x^0)/(x^1) = 0 // * x^2
x^1*(10*x^1-4/3*x^2+6*x^0) = 0
x^1
(-4/3)*x^2+10*x+6 = 0
(-4/3)*x^2+10*x+6 = 0
DELTA = 10^2-(4*6*(-4/3))
DELTA = 132
DELTA > 0
x = (132^(1/2)-10)/(2*(-4/3)) or x = (-132^(1/2)-10)/(2*(-4/3))
x = -3/8*(2*33^(1/2)-10) or x = -3/8*(-2*33^(1/2)-10)
x in { -3/8*(2*33^(1/2)-10), -3/8*(-2*33^(1/2)-10)}
x in { -3/8*(2*33^(1/2)-10), -3/8*(-2*33^(1/2)-10) }
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