X*2-7x+13/x-5

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Solution for X*2-7x+13/x-5 equation: 


D( x )

x = 0

x = 0

x = 0

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

2*X-(7*x)+13/x-5 = 0

2*X-7*x+13/x-5 = 0

13*x^-1-7*x^1-5*x^0 = 0

(13*x^0-7*x^2-5*x^1)/(x^1) = 0 // * x^2

x^1*(13*x^0-7*x^2-5*x^1) = 0

x^1

13-7*x^2-5*x = 0

13-7*x^2-5*x = 0

DELTA = (-5)^2-(-7*4*13)

DELTA = 389

DELTA > 0

x = (389^(1/2)+5)/(-7*2) or x = (5-389^(1/2))/(-7*2)

x = (389^(1/2)+5)/(-14) or x = (5-389^(1/2))/(-14)

x in { (389^(1/2)+5)/(-14), (5-389^(1/2))/(-14)} 

x in { (389^(1/2)+5)/(-14), (5-389^(1/2))/(-14) }

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