3x - x² ≠ 0
x × (3 - x) ≠ 0
x₁ ≠ 0;
x₂ ≠ 3;
D(y) = (-∞ ; 0) ∪ (0 ; 3) ∪ (3 ; +∞).
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3x - x² ≠ 0
x × (3 - x) ≠ 0
x₁ ≠ 0;
x₂ ≠ 3;
D(y) = (-∞ ; 0) ∪ (0 ; 3) ∪ (3 ; +∞).