(3x/x-7)-(x+7/x)

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Solution for (3x/x-7)-(x+7/x) equation: 


D( x )

x = 0

x = 0

x = 0

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

(3*x)/x-x-(7/x)-7 = 0

(3*x)/x-x-7*x^-1-7 = 0

-1*x^1-7*x^-1-4*x^0 = 0

(-1*x^2-4*x^1-7*x^0)/(x^1) = 0 // * x^2

x^1*(-1*x^2-4*x^1-7*x^0) = 0

x^1

-x^2-4*x-7 = 0

-x^2-4*x-7 = 0

DELTA = (-4)^2-(-7*(-1)*4)

DELTA = -12

DELTA < 0

x in { } 

x belongs to the empty set

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