n2-n/5=0

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Solution for n2-n/5=0 equation: 


n in (-oo:+oo)

n^2-(n/5) = 0

n^2-1/5*n = 0

DELTA = (-1/5)^2-(0*1*4)

DELTA = 1/25

DELTA > 0

n = ((1/25)^(1/2)+1/5)/(1*2) or n = (1/5-(1/25)^(1/2))/(1*2)

n = 1/5 or n = 0

n in { 0, 1/5 }

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