Posted Sun Nov 08, 2015 4:23 pm
Giải hệ phương trình sau:
1.$\left\{\begin{matrix} x-3\sqrt{x+3}=3\sqrt{y-5}-y & & \\ \sqrt{x^2+16(y-x)}+y=2\sqrt{xy} & & \end{matrix}\right.$
2.$\left\{\begin{matrix} \sqrt{2(x^2+y^2)+2(5x-3y)-4(xy-3)}+\sqrt{x+1}=3\sqrt{y} & & \\ \sqrt{y^2-4(x+y)+17}-\sqrt{x-y+3}=2 & & \end{matrix}\right.$