4.
已知圆\(O\)\({\,\!}_{1}\)和圆\(O\)\({\,\!}_{2}\)的极坐标方程为\(ρ\)\(=2\),\(ρ\)\({\,\!}^{2}-2 \sqrt{2}\) \(ρ\)\(\cos \left(\begin{matrix}θ- \dfrac{π}{4}\end{matrix}\right)=2\).
\((1)\)把圆\(O\)\({\,\!}_{1}\)和圆\(O\)\({\,\!}_{2}\)的极坐标方程化为直角坐标方程;
\((2)\)求经过两圆交点的直线的极坐标方程.