z^2/6-z/2-3=0

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Solution for z^2/6-z/2-3=0 equation: 


z in (-oo:+oo)

(z^2)/6-(z/2)-3 = 0

1/6*z^2-1/2*z-3 = 0

DELTA = (-1/2)^2-(-3*1/6*4)

DELTA = 9/4

DELTA > 0

z = ((9/4)^(1/2)+1/2)/(1/6*2) or z = (1/2-(9/4)^(1/2))/(1/6*2)

z = 6 or z = -3

z in { -3, 6 }

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