P
pl09


1,$x$+$\sqrt{5+\sqrt{x-1}}$=6
2,$\left\{\begin{array}{l}x^3-xy^2+2000y=0\\ y^3-yx^2-500x=0\end{array}\right.$
2,$\left\{\begin{array}{l}x^3-xy^2+2000y=0\\ y^3-yx^2-500x=0\end{array}\right.$