8(x-y)平方(x+y)-6(y-x)三次方

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8(x-y)平方(x+y)-6(y-x)三次方

8(x-y)平方(x+y)-6(y-x)三次方
8(x-y)平方(x+y)-6(y-x)三次方

8(x-y)平方(x+y)-6(y-x)三次方
8(x-y)²(x+y)-6(y-x)³
=8(x-y)²(x+y)+6(x-y)³
=2(x-y)²[4(x+y)+3(x-y)]
=2(x-y)²(4x+4y+3x-3y)
=2(x-y)²(7x+y)

8(x-y)平方(x+y)-6(y-x)三次方
=8(x-y)²(x+y)+6(x-y)³
=2(x-y)²(4x+4y+3x-3y)
=2(x-y)²(7x+y)

8(x-y)²(x+y)-6(y-x)³.........因为(x-y)³=-(y-x)³
=8(x-y)²(x+y)+6(x-y)³
=2(x-y)²[4(x+y)+3(x-y)]
=2(x-y)²(7x+y)