Atasi untuk x
\left\{\begin{matrix}x\in [-\frac{2\sqrt{3}}{3},0)\cup (0,\frac{2\sqrt{3}}{3}]\text{, }&y=0\\x\in [-\frac{\sqrt{12-3y}}{3},\frac{\sqrt{12-3y}}{3}]\text{, }&y>0\text{ and }y\leq 4\end{matrix}\right,
Atasi untuk y
\left\{\begin{matrix}y\in (-3x^{2},4-3x^{2}]\text{, }&x=0\\y\in [0,4-3x^{2}]\text{, }&x\neq 0\text{ and }|x|\leq \frac{2\sqrt{3}}{3}\end{matrix}\right,
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