(-9x^3+3x^2-15x)/(-3x)

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Solution for (-9x^3+3x^2-15x)/(-3x) equation: 


D( x )

-3*x = 0

-3*x = 0

-3*x = 0

-3*x = 0 // : -3

x = 0

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

(3*x^2-9*x^3-(15*x))/(-3*x) = 0

(3*x^2-9*x^3-15*x)/(-3*x) = 0

3*x^2-9*x^3-15*x = 0

3*x*(x-3*x^2-5) = 0

x-3*x^2-5 = 0

DELTA = 1^2-(-5*(-3)*4)

DELTA = -59

DELTA < 0

3*x = 0

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

3*x = 0 // : 3

x = 0

x in { 0} 

x belongs to the empty set

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