x^2-(2/3)x-1=0

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Solution for x^2-(2/3)x-1=0 equation: 


x in (-oo:+oo)

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

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

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

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

DELTA = 40/9

DELTA > 0

x = ((40/9)^(1/2)+2/3)/(1*2) or x = (2/3-(40/9)^(1/2))/(1*2)

x = ((40/9)^(1/2)+2/3)/2 or x = (2/3-(40/9)^(1/2))/2

x in { (2/3-(40/9)^(1/2))/2, ((40/9)^(1/2)+2/3)/2 }

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