x No Plagiarism!pHthU4JYUtryyJJk2lggposted on PENANA 坐標平面上,二次函數y=-x+6x-9的圖形的頂點為A,且此函數圖形與y軸交於B 點。若在函數圖形上取一點C ,在x軸上取一點D ,使得四邊形ABCD 為平行四邊形,則D 點坐標為何?3.139.98.233ns3.139.98.233da2