-x^2-1/2x-1=0

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Solution for -x^2-1/2x-1=0 equation: 


x in (-oo:+oo)

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

(-x)^2+(-1/2)*x-1 = 0

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

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

DELTA = 17/4

DELTA > 0

x = ((17/4)^(1/2)+1/2)/(1*2) or x = (1/2-(17/4)^(1/2))/(1*2)

x = ((17/4)^(1/2)+1/2)/2 or x = (1/2-(17/4)^(1/2))/2

x in { (1/2-(17/4)^(1/2))/2, ((17/4)^(1/2)+1/2)/2 }

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