1 x/3y与 3x/2y² 2xy/6y² 6xy/6y²
2 6c/a²b 与 c/3ab² 18bc/3a²b² ac/3a²b²
3 (x-y)/(2x+2y) 与 xy/(x+y)² (x²-y²)/2(x+y)² 2xy/2(x+y)²
4 2mn /(4m²-9)与 (2m-3)/(2m+3) 2mn /(4m²-9) (2m-3)²/(4m²-9)
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1 x/3y与 3x/2y² 2xy/6y² 6xy/6y²
2 6c/a²b 与 c/3ab² 18bc/3a²b² ac/3a²b²
3 (x-y)/(2x+2y) 与 xy/(x+y)² (x²-y²)/2(x+y)² 2xy/2(x+y)²
4 2mn /(4m²-9)与 (2m-3)/(2m+3) 2mn /(4m²-9) (2m-3)²/(4m²-9)
回答完毕 希望采纳 谢谢