x+3/x=4

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Solution for x+3/x=4 equation: 


D( x )

x = 0

x = 0

x = 0

x in (-oo:0) U (0:+oo)

x+3/x = 4 // - 4

x+3/x-4 = 0

1*x^1+3*x^-1-4*x^0 = 0

(1*x^2-4*x^1+3*x^0)/(x^1) = 0 // * x^2

x^1*(1*x^2-4*x^1+3*x^0) = 0

x^1

x^2-4*x+3 = 0

x^2-4*x+3 = 0

DELTA = (-4)^2-(1*3*4)

DELTA = 4

DELTA > 0

x = (4^(1/2)+4)/(1*2) or x = (4-4^(1/2))/(1*2)

x = 3 or x = 1

x in { 1, 3} 

x in { 1, 3 }

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