问题:
计算:
(1)(x-y)(x+y)(x 2+y 2)
(2)(a-2b+c)(a+2b-c)
计算:
(1)(x-y)(x+y)(x 2+y 2)
(2)(a-2b+c)(a+2b-c)
(1)(x-y)(x+y)(x 2+y 2)
(2)(a-2b+c)(a+2b-c)
参考答案: