2.
已知三点\(O(0,0)\),\(R(-2,1)\),\(Q(2,1)\),曲线\(C\)上任意一点\(M(x,y)\)满足\(\left| \left. \overrightarrow{MR}+\overrightarrow{MQ} \right. \right|=\overrightarrow{OM}·(\overrightarrow{OR}+\overrightarrow{OQ})+2\).
\((1)\)求曲线\(C\)的方程; \((2)\)若\(A\),\(B\)是曲线\(C\)上分别位于点\(Q\)两边的任意两点,过\(A\),\(B\)分别作曲线\(C\)的切线交于点\(P\),过点\(Q\)作曲线\(C\)的切线分别交直线\(PA\),\(PB\)于\(D\),\(E\)两点\(.\)证明:\(\triangle QAB\)与\(\triangle PDE\)的面积之比为定值.