X四次方-8X²-Y²+16

问题描述:

X四次方-8X²-Y²+16

X四次方-8X²-Y²+16
=X四次方-8X²+16-Y²
=(x²-4)²-y²
=(x²-4+y)(x²-4-y)
如果本题有什么不明白可以追问,