Giải hệ phương trình:
$\left\{\begin{matrix}
\frac{x - y}{1 - xy} = \frac{1-3x}{1-x}& \\
\frac{x+y}{1+xy}= \frac{1-2y}{2-y} &
\end{matrix}\right.$
$\frac{x - y}{1 - xy} = \frac{1-3x}{1-x}$
Started By phamvanha92, 03-12-2012 - 23:38
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