(1)16y的四次方-8x的二次方y的二次方+x的四次方=(x²-4y²)²=(x+2y)²(x-2y)²(2)4x²(x-y)+(y-x)=4x²(x-y)-(x-y)=(x-y)(4x²-1)=(x-y)(2x+1)(2x-1)
(1)原式=(4y²)²-8x²y²+(x²)²=(x²-4y²)²=(x+2y)²(x-2y)²(2)原式=4x²(x-y)-(x-y)=(x-y)(4x²-1)=(x-y)(x+2y)(x-2y)
我好像来迟了。