x^2+5/2x-1

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Solution for x^2+5/2x-1 equation: 


x in (-oo:+oo)

x^2+(5/2)*x-1 = 0

x^2+5/2*x-1 = 0

DELTA = (5/2)^2-(-1*1*4)

DELTA = 41/4

DELTA > 0

x = ((41/4)^(1/2)-5/2)/(1*2) or x = (-(41/4)^(1/2)-5/2)/(1*2)

x = ((41/4)^(1/2)-5/2)/2 or x = (-((41/4)^(1/2)+5/2))/2

x in { (-((41/4)^(1/2)+5/2))/2, ((41/4)^(1/2)-5/2)/2 }

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