3(x-y)²(x+y)²-9(x+y)³(y-x)³
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3(x-y)²(x+y)²-9(x+y)³(y-x)³
3(x-y)²(x+y)²-9(x+y)³(y-x)³
3(x-y)²(x+y)²-9(x+y)³(y-x)³
3(x-y)²(x+y)²-9(x+y)³(y-x)³
=3(x-y)²(x+y)²+9(x+y)³(x-y)³
=3(x-y)²(xy)²[1+3(x+y)(x-y)]
=3(x-y)²(x+y)²(1+3x²-3y²)
3(x-y)²(x+y)²-9(x+y)³(y-x)³
=3(x-y)²(x+y)²(1-3y²+3x²)
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3(x-y)²(x+y)²-9(x+y)³(y-x)³
=3(x-y)²(x+y)²(1-3y²+3x²)
您好,很高兴为您解答,skyhunter002为您答疑解惑
如果本题有什么不明白可以追问,如果满意记得采纳
如果有其他问题请采纳本题后另发点击向我求助,答题不易,请谅解,谢谢。
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