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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
3/x+2 = (7/5)*x-1 // - (7/5)*x-1
3/x-((7/5)*x)+1+2 = 0
(-7/5)*x+3/x+1+2 = 0
3*x^-1-7/5*x^1+3*x^0 = 0
(3*x^1-7/5*x^2+3*x^0)/(x^1) = 0 // * x^2
x^1*(3*x^1-7/5*x^2+3*x^0) = 0
x^1
(-7/5)*x^2+3*x+3 = 0
(-7/5)*x^2+3*x+3 = 0
DELTA = 3^2-(3*4*(-7/5))
DELTA = 129/5
DELTA > 0
x = ((129/5)^(1/2)-3)/(2*(-7/5)) or x = (-(129/5)^(1/2)-3)/(2*(-7/5))
x = -5/14*((129/5)^(1/2)-3) or x = 5/14*((129/5)^(1/2)+3)
x in { -5/14*((129/5)^(1/2)-3), 5/14*((129/5)^(1/2)+3)}
x in { -5/14*((129/5)^(1/2)-3), 5/14*((129/5)^(1/2)+3) }
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