[填空题]
$\text { The double folium is a curve defined by the equation }\left(x^{2}+y^{2}\right)^{2}=8 x y^{2} \text {, shown in the diagram below. }$
\text { Determine the exact coordinates of the point } \mathrm{P} \text { on the curve where the tangent line is parallel to the } x \text {-axis. } (a,b) a = b =
