5m Zen
X^4+4x^3 18x^2 12x+9u003d0
X^4+4x^3 18x^2 12x+9u003d0 pictures 5
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X^4+4x^3 18x^2 12x+9u003d0
X^4+4x^3 18x^2 12x+9u003d0
