4x²(x-y)+(y-x)
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4x²(x-y)+(y-x)4x²(x-y)+(y-x)4x²(x-y)+(y-x)4x²(x-y)+(y-x)=4x²(x-y)-(x-y)=(x-
4x²(x-y)+(y-x)
4x²(x-y)+(y-x)
4x²(x-y)+(y-x)
4x²(x-y)+(y-x)
=4x²(x-y)-(x-y)
=(x-y)(4x²-1)
=(x-y)(2x+1)(2x-1)