若3X+2Y=0(XY≠0)则代数式2X+3Y/2X-3Y=若3X+2Y=0,则代数式2X+3Y/2X-3Y=?(XY不等于0)_数学解答

若3X+2Y=0(XY≠0)则代数式2X+3Y/2X-3Y=
若3X+2Y=0,则代数式2X+3Y/2X-3Y=?(XY不等于0)

人气：234 ℃　时间：2019-09-11 14:12:37

解答

若3X+2Y=0,则代数式2X+3Y/2X-3Y=?(XY不等于0) ---------------------------------------------用换元法计算,简单,不容易错3x+2y=03x=-2y可以设3x=-2y=6k那么x=2k,y=-3k代入2X+3Y/2X-3Y,有2X+3Y/2X-3Y=(4k-9k)/(4k+9k...