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Member Since 17-08-2013
Offline Last Active 20-08-2013 - 17:24

17-08-2013 - 20:11

Giải hệ phương trình sau

$\left\{\begin{matrix}x^2+2xy -y=0\\ x^3-x^2y+4y^2-5x+2=0 \end{matrix}\right.$

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