(z^2/6)-(z/2)-45=0

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Solution for (z^2/6)-(z/2)-45=0 equation: 


z in (-oo:+oo)

(z^2)/6-(z/2)-45 = 0

1/6*z^2-1/2*z-45 = 0

DELTA = (-1/2)^2-(-45*1/6*4)

DELTA = 121/4

DELTA > 0

z = ((121/4)^(1/2)+1/2)/(1/6*2) or z = (1/2-(121/4)^(1/2))/(1/6*2)

z = 18 or z = -15

z in { -15, 18 }

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