(y^2/2)-y-4

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Solution for (y^2/2)-y-4 equation: 


y in (-oo:+oo)

(y^2)/2-y-4 = 0

1/2*y^2-y-4 = 0

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

DELTA = 9

DELTA > 0

y = (9^(1/2)+1)/(1/2*2) or y = (1-9^(1/2))/(1/2*2)

y = 4 or y = -2

y in { -2, 4 }

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