(x-y)三次方-(y-x)²
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(x-y)三次方-(y-x)²
(x-y)三次方-(y-x)²
(x-y)三次方-(y-x)²
(x-y)³-(y-x)²
=(x-y)³-(x-y)²
=(x-y)²(x-y-1)
(x-y)三次方-(y-x)²
=(x-y)³-(x-y)²
=(x-y)² ( x-y-1)
x-y的平方(x-y-1)
(x-y)三次方-(y-x)²
(x-y)三次方-(y-x)²
(x-y)三次方-(y-x)²
(x-y)³-(y-x)²
=(x-y)³-(x-y)²
=(x-y)²(x-y-1)
(x-y)三次方-(y-x)²
=(x-y)³-(x-y)²
=(x-y)² ( x-y-1)
x-y的平方(x-y-1)