9x^4-18x^3-3x/3x

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Solution for 9x^4-18x^3-3x/3x equation: 


x in (-oo:+oo)

9*x^4-(18*x^3)-(((3*x)/3)*x) = 0

9*x^4-18*x^3-x^2 = 0

9*x^4-18*x^3-x^2 = 0

x^2*(9*x^2-18*x-1) = 0

9*x^2-18*x-1 = 0

DELTA = (-18)^2-(-1*4*9)

DELTA = 360

DELTA > 0

x = (360^(1/2)+18)/(2*9) or x = (18-360^(1/2))/(2*9)

x = (6*10^(1/2)+18)/18 or x = (18-6*10^(1/2))/18

x^2 = 0

1*x^2 = 0 // : 1

x^2 = 0

x = 0

x in { (18-6*10^(1/2))/18, (6*10^(1/2)+18)/18, 0 }

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