22.在直角坐标系xOy中,曲线C的参数方程为 $\scriptstyle { \left\{ \begin{array} { l l } { x = 2 - t - t ^ { 2 } , } \\ { y = 2 - t + t ^ { 2 } } \end{array} \right. }$ (t为参数且t≠1),C与坐标轴交于A,B两点.
(1)求| $A B \parallel$ :
(2)以坐标原点为极点,x轴正半轴为极轴建立极坐标系,求直线AB的极坐标方程.
Answer key
(1) $4 { \sqrt { 1 0 } }$; (2) $3 \rho \cos \theta - \rho \sin \theta + 1 2 = 0$