5/10x+2/5x^2

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Solution for 5/10x+2/5x^2 equation: 


x in (-oo:+oo)

(2/5)*x^2+(5/10)*x = 0

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

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

DELTA = 1/4

DELTA > 0

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

x = 0 or x = -5/4

x in { -5/4, 0 }

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