r^2-4/3r-4/3=0

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Solution for r^2-4/3r-4/3=0 equation: 


r in (-oo:+oo)

r^2-((4/3)*r)-(4/3) = 0

r^2+(-4/3)*r-4/3 = 0

r^2-4/3*r-4/3 = 0

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

DELTA = 64/9

DELTA > 0

r = ((64/9)^(1/2)+4/3)/(1*2) or r = (4/3-(64/9)^(1/2))/(1*2)

r = 2 or r = -2/3

r in { -2/3, 2 }

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