x^2/2-1+x=-1

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


x in (-oo:+oo)

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

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

1/2*x^2+x = 0

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

DELTA = 1

DELTA > 0

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

x = 0 or x = -2

x in { -2, 0 }

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