2/xy=( )/2ax²y² x³-xy²/(x-y)²=x( )/x-y

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2/xy=()/2ax²y²x³-xy²/(x-y)²=x()/x-y2/xy=()/2ax²y²x³-xy²

2/xy=( )/2ax²y² x³-xy²/(x-y)²=x( )/x-y
2/xy=( )/2ax²y² x³-xy²/(x-y)²=x( )/x-y

2/xy=( )/2ax²y² x³-xy²/(x-y)²=x( )/x-y
2/xy=(axy)/2ax²y²
x³-xy²/(x-y)²=x(x²-y²)/(x-y)²=x(x-y)(x+y)/(x-y)²=x(x+y)/(x-y)