1/2x^2-4x-2=0

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Solution for 1/2x^2-4x-2=0 equation: 


x in (-oo:+oo)

(1/2)*x^2-(4*x)-2 = 0

(1/2)*x^2-4*x-2 = 0

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

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

DELTA = 20

DELTA > 0

x = (20^(1/2)+4)/(1/2*2) or x = (4-20^(1/2))/(1/2*2)

x = 2*5^(1/2)+4 or x = 4-2*5^(1/2)

x in { 4-2*5^(1/2), 2*5^(1/2)+4 }

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