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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
4*x-11 = -3/x // + -3/x
4*x-(-3/x)-11 = 0
4*x+3*x^-1-11 = 0
4*x^1+3*x^-1-11*x^0 = 0
(4*x^2-11*x^1+3*x^0)/(x^1) = 0 // * x^2
x^1*(4*x^2-11*x^1+3*x^0) = 0
x^1
4*x^2-11*x+3 = 0
4*x^2-11*x+3 = 0
DELTA = (-11)^2-(3*4*4)
DELTA = 73
DELTA > 0
x = (73^(1/2)+11)/(2*4) or x = (11-73^(1/2))/(2*4)
x = (73^(1/2)+11)/8 or x = (11-73^(1/2))/8
x in { (11-73^(1/2))/8, (73^(1/2)+11)/8}
x in { (11-73^(1/2))/8, (73^(1/2)+11)/8 }
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