-x^2+12/15x=0

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Solution for -x^2+12/15x=0 equation: 


x in (-oo:+oo)

(-x)^2+(12/15)*x = 0

x^2+4/5*x = 0

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

DELTA = 16/25

DELTA > 0

x = ((16/25)^(1/2)-4/5)/(1*2) or x = (-(16/25)^(1/2)-4/5)/(1*2)

x = 0 or x = -4/5

x in { -4/5, 0 }

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