Question

如果將x⁴-yⁿ分解后得(x²+y²)(x+y)(x-y)，那么n的值是

1. A.
   2
2. B.
   8
3. C.
   4
4. D.
   6

Answer 1

C
利用多項式乘法驗證：(x²+y²)(x+y)(x-y)＝x⁴-y⁴．