x2/3-8x1/3-9=0

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Solution for x2/3-8x1/3-9=0 equation: 


x in (-oo:+oo)

(x^2)/3-((8*x^1)/3)-9 = 0

(x^2)/3+(-8/3)*x-9 = 0

1/3*x^2-8/3*x-9 = 0

DELTA = (-8/3)^2-(-9*1/3*4)

DELTA = 64/9+12

DELTA = 172/9

DELTA > 0

x = ((64/9+12)^(1/2)+8/3)/(1/3*2) or x = (8/3-(64/9+12)^(1/2))/(1/3*2)

x = 3/2*((64/9+12)^(1/2)+8/3) or x = 3/2*(8/3-(64/9+12)^(1/2))

x in { 3/2*(8/3-(64/9+12)^(1/2)), 3/2*((64/9+12)^(1/2)+8/3) }

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