x+7/x+6+1+1/x+6

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Solution for x+7/x+6+1+1/x+6 equation: 


D( x )

x = 0

x = 0

x = 0

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

x+7/x+1/x+1+6+6 = 0

1*x^1+8*x^-1+13*x^0 = 0

(1*x^2+13*x^1+8*x^0)/(x^1) = 0 // * x^2

x^1*(1*x^2+13*x^1+8*x^0) = 0

x^1

x^2+13*x+8 = 0

x^2+13*x+8 = 0

DELTA = 13^2-(1*4*8)

DELTA = 137

DELTA > 0

x = (137^(1/2)-13)/(1*2) or x = (-137^(1/2)-13)/(1*2)

x = (137^(1/2)-13)/2 or x = (-(137^(1/2)+13))/2

x in { (-(137^(1/2)+13))/2, (137^(1/2)-13)/2} 

x in { (-(137^(1/2)+13))/2, (137^(1/2)-13)/2 }

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