初二下册计算:(x-y /x+2y)³

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初二下册计算:(x-y/x+2y)³初二下册计算:(x-y/x+2y)³初二下册计算:(x-y/x+2y)³=(x+2y-3y/x+2y)^3={1-(3y/x+2y)}

初二下册计算:(x-y /x+2y)³
初二下册计算:(x-y /x+2y)³

初二下册计算:(x-y /x+2y)³
=(x+2y-3y/x+2y)^3
={1-(3y/x+2y)}^3
就是这样了