2.試求下列各圓的圓心及半徑:
(1)x^2+y^2+2x-6y=0
(2)x^2+y^2+8x+12=0
(3)2x^2+2y^2-4x-6y-7=0
(4)x^2+y^2-6x+8y-11=0
收錄日期: 2021-04-24 23:27:59
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20150413000016KK05150