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(x^3)/3+4*x^2+22*x = 0
1/3*x^3+4*x^2+22*x = 0
x*(1/3*x^2+4*x+22) = 0
1/3*x^2+4*x+22 = 0
DELTA = 4^2-(1/3*4*22)
DELTA = -40/3
DELTA < 0
x = 0
x = 0
x = 0
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