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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
4*x+46/x-4 = 180 // - 180
4*x+46/x-180-4 = 0
4*x^1+46*x^-1-184*x^0 = 0
(4*x^2-184*x^1+46*x^0)/(x^1) = 0 // * x^2
x^1*(4*x^2-184*x^1+46*x^0) = 0
x^1
4*x^2-184*x+46 = 0
4*x^2-184*x+46 = 0
DELTA = (-184)^2-(4*4*46)
DELTA = 33120
DELTA > 0
x = (33120^(1/2)+184)/(2*4) or x = (184-33120^(1/2))/(2*4)
x = (12*230^(1/2)+184)/8 or x = (184-12*230^(1/2))/8
x in { (184-12*230^(1/2))/8, (12*230^(1/2)+184)/8}
x in { (184-12*230^(1/2))/8, (12*230^(1/2)+184)/8 }
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