用分解因式解答:x的4次方-8x的2次方-y方+16

问题描述:

用分解因式解答:x的4次方-8x的2次方-y方+16

=(X^4-8X^2+16)-y^2
=(X^2-4)^2-y^2
=(X^2-4+y)(X^2-4-y)
看得懂不?