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

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


X in (-oo:+oo)

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

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

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

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

DELTA = 5

DELTA > 0

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

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

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

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