7=(X+3/X+9)

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Solution for 7=(X+3/X+9) equation: 


D( X )

X = 0

X = 0

X = 0

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

7 = X+3/X+9 // - X+3/X+9

7-X-(3/X)-9 = 0

7-X-3*X^-1-9 = 0

-1*X^1-3*X^-1-2*X^0 = 0

(-1*X^2-2*X^1-3*X^0)/(X^1) = 0 // * X^2

X^1*(-1*X^2-2*X^1-3*X^0) = 0

X^1

-X^2-2*X-3 = 0

-X^2-2*X-3 = 0

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

DELTA = -8

DELTA < 0

X in { } 

X belongs to the empty set

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