r^2-16/3r-4

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Solution for r^2-16/3r-4 equation: 


r in (-oo:+oo)

r^2-((16/3)*r)-4 = 0

r^2+(-16/3)*r-4 = 0

r^2-16/3*r-4 = 0

DELTA = (-16/3)^2-(-4*1*4)

DELTA = 400/9

DELTA > 0

r = ((400/9)^(1/2)+16/3)/(1*2) or r = (16/3-(400/9)^(1/2))/(1*2)

r = 6 or r = -2/3

r in { -2/3, 6 }

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