3/x-1+2-x=8

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Solution for 3/x-1+2-x=8 equation: 


D( x )

x = 0

x = 0

x = 0

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

3/x-x-1+2 = 8 // - 8

3/x-x-8-1+2 = 0

3*x^-1-1*x^1-7*x^0 = 0

(3*x^0-1*x^2-7*x^1)/(x^1) = 0 // * x^2

x^1*(3*x^0-1*x^2-7*x^1) = 0

x^1

3-x^2-7*x = 0

3-x^2-7*x = 0

DELTA = (-7)^2-(-1*3*4)

DELTA = 61

DELTA > 0

x = (61^(1/2)+7)/(-1*2) or x = (7-61^(1/2))/(-1*2)

x = (61^(1/2)+7)/(-2) or x = (7-61^(1/2))/(-2)

x in { (61^(1/2)+7)/(-2), (7-61^(1/2))/(-2)} 

x in { (61^(1/2)+7)/(-2), (7-61^(1/2))/(-2) }

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