x^2=-7/9x

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Solution for x^2=-7/9x equation: 


x in (-oo:+oo)

x^2 = (-7/9)*x // - (-7/9)*x

x^2-((-7/9)*x) = 0

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

x^2+7/9*x = 0

DELTA = (7/9)^2-(0*1*4)

DELTA = 49/81

DELTA > 0

x = ((49/81)^(1/2)-7/9)/(1*2) or x = (-(49/81)^(1/2)-7/9)/(1*2)

x = 0 or x = -7/9

x in { -7/9, 0 }

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