题目

约分 （6ab²)/(8b³) (x³-2x²y)/(x²y-2xy²)
（6ab²)/(8b³) (x³-2x²y)/(x²y-2xy²) (16b²y²)/(20ay³) (x²+6x+9)/(x²-9) (m³-2m²-m)/(m²-m) (a²+ab)/(a²-b²) 约分

提问时间：2020-10-30

答案

（6ab²)/(8b³) =3a/4b(x³-2x²y)/(x²y-2xy²) =x²(x-2y)/xy(x-2y)=x/y(16b²y²)/(20ay³)=4b²/(5ay)(x²+6x+9)/(x²-9) =(x+3)²/(x+3)(x-3)=(x+3)...