Nghiệm của hệ \(\left\{\begin{matrix} x-y\sqrt{3}=...

C

- Hướng dẫn giải

\(\left\{\begin{matrix} x-y\sqrt{3}=0\\ x\sqrt{3}+2y=3\sqrt{2} \end{matrix}\right.\)\(\Leftrightarrow \left\{\begin{matrix} x\sqrt{3}-3y=0\\ x\sqrt{3}+2y=3\sqrt{2} \end{matrix}\right.\)\(\Leftrightarrow \left\{\begin{matrix} x\sqrt{3}-3y=0\\ 5y=3\sqrt{2} \end{matrix}\right.\)\(\Leftrightarrow \left\{\begin{matrix} x\sqrt{3}-3y=0\\ y=\frac{3\sqrt{2}}{5} \end{matrix}\right.\)\(\Leftrightarrow \left\{\begin{matrix} x=\frac{3\sqrt{6}}{5}\\ y=\frac{3\sqrt{2}}{5} \end{matrix}\right.\)