1/2y2-y-1/2

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Solution for 1/2y2-y-1/2 equation: 


y in (-oo:+oo)

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

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

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

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

DELTA = 2

DELTA > 0

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

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

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

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