y^2-y/2-1/5=0

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Solution for y^2-y/2-1/5=0 equation: 


y in (-oo:+oo)

y^2-(y/2)-(1/5) = 0

y^2-(y/2)-1/5 = 0

y^2-1/2*y-1/5 = 0

DELTA = (-1/2)^2-(-1/5*1*4)

DELTA = 21/20

DELTA > 0

y = ((21/20)^(1/2)+1/2)/(1*2) or y = (1/2-(21/20)^(1/2))/(1*2)

y = ((21/20)^(1/2)+1/2)/2 or y = (1/2-(21/20)^(1/2))/2

y in { (1/2-(21/20)^(1/2))/2, ((21/20)^(1/2)+1/2)/2 }

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