z^2/6-5z/2-9

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Solution for z^2/6-5z/2-9 equation: 


z in (-oo:+oo)

(z^2)/6-((5*z)/2)-9 = 0

(z^2)/6+(-5/2)*z-9 = 0

1/6*z^2-5/2*z-9 = 0

DELTA = (-5/2)^2-(-9*1/6*4)

DELTA = 49/4

DELTA > 0

z = ((49/4)^(1/2)+5/2)/(1/6*2) or z = (5/2-(49/4)^(1/2))/(1/6*2)

z = 18 or z = -3

z in { -3, 18 }

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