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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(-3/4)*x+2+24 = 6-1/x // - 6-1/x
(-3/4)*x-(-1/x)-6+2+24 = 0
(-3/4)*x+x^-1-6+2+24 = 0
1*x^-1-3/4*x^1+20*x^0 = 0
(20*x^1-3/4*x^2+1*x^0)/(x^1) = 0 // * x^2
x^1*(20*x^1-3/4*x^2+1*x^0) = 0
x^1
(-3/4)*x^2+20*x+1 = 0
(-3/4)*x^2+20*x+1 = 0
DELTA = 20^2-(1*4*(-3/4))
DELTA = 403
DELTA > 0
x = (403^(1/2)-20)/(2*(-3/4)) or x = (-403^(1/2)-20)/(2*(-3/4))
x = -2/3*(403^(1/2)-20) or x = 2/3*(403^(1/2)+20)
x in { -2/3*(403^(1/2)-20), 2/3*(403^(1/2)+20)}
x in { -2/3*(403^(1/2)-20), 2/3*(403^(1/2)+20) }
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