x^2/5=x/15

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Solution for x^2/5=x/15 equation: 


x in (-oo:+oo)

(x^2)/5 = x/15 // - x/15

(x^2)/5-(x/15) = 0

1/5*x^2-1/15*x = 0

DELTA = (-1/15)^2-(0*1/5*4)

DELTA = 1/225

DELTA > 0

x = ((1/225)^(1/2)+1/15)/(1/5*2) or x = (1/15-(1/225)^(1/2))/(1/5*2)

x = 1/3 or x = 0

x in { 0, 1/3 }

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