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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
3/x+1 = (9/4)*x+5 // - (9/4)*x+5
3/x-((9/4)*x)-5+1 = 0
(-9/4)*x+3/x-5+1 = 0
3*x^-1-9/4*x^1-4*x^0 = 0
(3*x^0-9/4*x^2-4*x^1)/(x^1) = 0 // * x^2
x^1*(3*x^0-9/4*x^2-4*x^1) = 0
x^1
(-9/4)*x^2-4*x+3 = 0
(-9/4)*x^2-4*x+3 = 0
DELTA = (-4)^2-(3*4*(-9/4))
DELTA = 43
DELTA > 0
x = (43^(1/2)+4)/(2*(-9/4)) or x = (4-43^(1/2))/(2*(-9/4))
x = -2/9*(43^(1/2)+4) or x = -2/9*(4-43^(1/2))
x in { -2/9*(43^(1/2)+4), -2/9*(4-43^(1/2))}
x in { -2/9*(43^(1/2)+4), -2/9*(4-43^(1/2)) }
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