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-3*x^2-((32/9)*x) = 0
(-32/9)*x-3*x^2 = 0
-3*x^2-32/9*x = 0
DELTA = (-32/9)^2-(-3*0*4)
DELTA = 1024/81
DELTA > 0
x = ((1024/81)^(1/2)+32/9)/(-3*2) or x = (32/9-(1024/81)^(1/2))/(-3*2)
x = -32/27 or x = 0
x in { -32/27, 0 }
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