H
heomoon


giup minh he pt nay. hay lam lun!
[tex]\left\{ \begin{array}{l} 8x^3 - y^3 = 63 \\ y^2 + 2x^2 + 2y - x=9 \end{array} \right.[/tex]
[tex]\left\{ \begin{array}{l} 8x^3 - y^3 = 63 \\ y^2 + 2x^2 + 2y - x=9 \end{array} \right.[/tex]
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