6(x-y)三次方-3y(y-x)二次方

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6(x-y)三次方-3y(y-x)二次方6(x-y)三次方-3y(y-x)二次方6(x-y)三次方-3y(y-x)二次方6(x-y)三次方-3y(x-y)二次方=3(x-y)²(2(x-y)

6(x-y)三次方-3y(y-x)二次方
6(x-y)三次方-3y(y-x)二次方

6(x-y)三次方-3y(y-x)二次方
6(x-y)三次方-3y(x-y)二次方
=3(x-y)²(2(x-y)-1)
=3(x-y)²(2x-2y-1)