(6/x+1)+(9+2x+2)

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Solution for (6/x+1)+(9+2x+2) equation: 


D( x )

x = 0

x = 0

x = 0

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

2*x+6/x+1+2+9 = 0

2*x^1+6*x^-1+12*x^0 = 0

(2*x^2+12*x^1+6*x^0)/(x^1) = 0 // * x^2

x^1*(2*x^2+12*x^1+6*x^0) = 0

x^1

2*x^2+12*x+6 = 0

2*x^2+12*x+6 = 0

DELTA = 12^2-(2*4*6)

DELTA = 96

DELTA > 0

x = (96^(1/2)-12)/(2*2) or x = (-96^(1/2)-12)/(2*2)

x = (4*6^(1/2)-12)/4 or x = (-4*6^(1/2)-12)/4

x in { (-4*6^(1/2)-12)/4, (4*6^(1/2)-12)/4} 

x in { (-4*6^(1/2)-12)/4, (4*6^(1/2)-12)/4 }

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