y^2-y-72/9-y

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Solution for y^2-y-72/9-y equation: 


y in (-oo:+oo)

y^2-y-y-(72/9) = 0

y^2-y-y-8 = 0

y^2-2*y-8 = 0

DELTA = (-2)^2-(-8*1*4)

DELTA = 36

DELTA > 0

y = (36^(1/2)+2)/(1*2) or y = (2-36^(1/2))/(1*2)

y = 4 or y = -2

y in { -2, 4 }

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