9x^3+6x^2-9x-1/3x

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Solution for 9x^3+6x^2-9x-1/3x equation:


x in (-oo:+oo)

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

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

9*x^3+6*x^2-28/3*x = 0

x*(9*x^2+6*x-28/3) = 0

9*x^2+6*x-28/3 = 0

DELTA = 6^2-(-28/3*4*9)

DELTA = 372

DELTA > 0

x = (372^(1/2)-6)/(2*9) or x = (-372^(1/2)-6)/(2*9)

x = (2*93^(1/2)-6)/18 or x = (-2*93^(1/2)-6)/18

x = 0

x = 0

x in { (-2*93^(1/2)-6)/18, (2*93^(1/2)-6)/18, 0 }

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