分解因式:我做完了,8(x²-2y²)-x(7x+y)+xy 4a四次方-64(5m²+3n²)²-(3m²+5n²)² x³+x²y-xy²-y³观察下列等式:4²-1²=3*5 5²-2²=3*7 6²-3²
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