2/9x+7/3x^2

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Solution for 2/9x+7/3x^2 equation: 


x in (-oo:+oo)

(7/3)*x^2+(2/9)*x = 0

7/3*x^2+2/9*x = 0

DELTA = (2/9)^2-(0*7/3*4)

DELTA = 4/81

DELTA > 0

x = ((4/81)^(1/2)-2/9)/(2*7/3) or x = (-(4/81)^(1/2)-2/9)/(2*7/3)

x = 0 or x = -2/21

x in { -2/21, 0 }

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