2/3n^2-7/9n

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Solution for 2/3n^2-7/9n equation: 


n in (-oo:+oo)

(2/3)*n^2-((7/9)*n) = 0

(2/3)*n^2+(-7/9)*n = 0

2/3*n^2-7/9*n = 0

DELTA = (-7/9)^2-(0*2/3*4)

DELTA = 49/81

DELTA > 0

n = ((49/81)^(1/2)+7/9)/(2/3*2) or n = (7/9-(49/81)^(1/2))/(2/3*2)

n = 7/6 or n = 0

n in { 0, 7/6 }

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