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)
急救啊!!!!!!!!!!!!!!!!!

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若3X+2Y=0，改哪则代数式2X+3Y/信歼信2X-3Y=？ (XY不等于0)
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用换元法计算,简单,不容易错

3x+2y=0
3x=-2y
可以设
3x=-2y=6k
那么x=2k,y=-3k

代入滑轮2X+3Y/2X-3Y,有
2X+3Y/2X-3Y=
(4k-9k)/(4k+9k)=-5/13

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Y=-3X/2
13X/2-9/4 或 -3Y-9/4

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3X+2Y=0 所以x=-2y/3 带手败入 2x=-4y/3 为

(-4y/3+3y)/(-4y/3-3y)=(5y/锋薯者银薯3)/(-13y/3)=-5/13

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5/13

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