(6/x+3)+(6/2x+6)

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Solution for (6/x+3)+(6/2x+6) equation: 


D( x )

x = 0

x = 0

x = 0

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

(6/2)*x+6/x+3+6 = 0

3*x^1+6*x^-1+9*x^0 = 0

(3*x^2+9*x^1+6*x^0)/(x^1) = 0 // * x^2

x^1*(3*x^2+9*x^1+6*x^0) = 0

x^1

3*x^2+9*x+6 = 0

3*x^2+9*x+6 = 0

DELTA = 9^2-(3*4*6)

DELTA = 9

DELTA > 0

x = (9^(1/2)-9)/(2*3) or x = (-9^(1/2)-9)/(2*3)

x = -1 or x = -2

x in { -2, -1} 

x in { -2, -1 }

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