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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
6/x+3 = (4/2)*x-7 // - (4/2)*x-7
6/x-((4/2)*x)+3+7 = 0
6/x-2*x+3+7 = 0
6*x^-1-2*x^1+10*x^0 = 0
(10*x^1-2*x^2+6*x^0)/(x^1) = 0 // * x^2
x^1*(10*x^1-2*x^2+6*x^0) = 0
x^1
10*x-2*x^2+6 = 0
10*x-2*x^2+6 = 0
DELTA = 10^2-(-2*4*6)
DELTA = 148
DELTA > 0
x = (148^(1/2)-10)/(-2*2) or x = (-148^(1/2)-10)/(-2*2)
x = (2*37^(1/2)-10)/(-4) or x = (-2*37^(1/2)-10)/(-4)
x in { (2*37^(1/2)-10)/(-4), (-2*37^(1/2)-10)/(-4)}
x in { (2*37^(1/2)-10)/(-4), (-2*37^(1/2)-10)/(-4) }
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