4x的3次方-4x2次方y-(x-y)

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4x的3次方-4x2次方y-(x-y)4x的3次方-4x2次方y-(x-y)4x的3次方-4x2次方y-(x-y)4x的3次方-4x2次方y-(x-y)=4x^2(x-y)-(x-y)=(x-y)(4

4x的3次方-4x2次方y-(x-y)
4x的3次方-4x2次方y-(x-y)

4x的3次方-4x2次方y-(x-y)
4x的3次方-4x2次方y-(x-y)
=4x^2(x-y)-(x-y)
=(x-y)(4x^2-1)
=(x-y)(2x+1)(2x-1)